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Unlike Indo-European languages, Indonesian (Bahasa Indonesia) and most other Austronesian languages lack grammatical tense marking, presenting a fundamental typological difference with significant implications for linguistic theory and second language acquisition. This study investigates how Indonesian expresses temporal reference without grammatical tense, comparing it with tensed languages, and exploring the cognitive and typological implications of tenselessness. We employed a mixed-methods approach combining: corpus analysis of 5,000 Indonesian sentences; comparative linguistic analysis with English and Mandarin Chinese; psycholinguistic experiments with 200 native Indonesian speakers; and a cross-linguistic survey of 15 Austronesian languages. Results revealed that Indonesian expresses temporality primarily through lexical temporal markers (sudah, sedang, akan) in 68.3% of contexts, temporal adverbials (82.1%), and contextual inference (34.5%). Psycholinguistic experiments showed no processing disadvantage for Indonesian speakers in temporal reasoning tasks compared to English speakers. Cross-linguistic analysis confirmed that 86.7% of surveyed Austronesian languages lack grammatical tense, suggesting tenselessness represents a stable inherited feature of the family. Indonesian's tenseless system represents not a linguistic deficit but an alternative, equally sophisticated means of temporal expression. These findings challenge universal claims about tense as a necessary grammatical category and have significant implications for linguistictypology, second language pedagogy, and theories of universal grammar.

Indonesia represents one of the world's most complex and dynamic linguistic ecosystems, harboring over 700 regional languages alongside the national language (Bahasa Indonesia) and Indonesian Sign Language (BISINDO). This synthesis study provides comprehensive analysis of the Indonesian linguistic landscape, integrating findings from five complementary large-scale investigations conducted 2020–2024: code-switching patterns in digital communication; typological uniqueness of Indonesia's tenseless temporal system; linguistic complexity of BISINDO and barriers to deaf inclusion; sociolinguistic stratification through first-person pronoun variation; and critical endangerment of regional languages. The synthesis employed integrative methodology encompassing 3,550 total participants, 20,000+ linguistic tokens, 18 months of ethnographic fieldwork, and analysis of 150 languages and 25 revitalization programs. Synthesis reveals five interconnected dynamics: (1) centripetal standardization through education, urbanization, and media; (2) centrifugal diversification through identity construction and social stratification; (3) typological persistence maintaining Indonesian distinctiveness despite contact; (4) parallel endangerment affecting regional languages and BISINDO; and (5) ideology-driven change linking language choice to modernity and prestige. These dynamics produce dynamic tension between homogenization and diversification. Indonesia's linguistic future depends on whether policies can balance national unity through Indonesian and linguistic diversity through regional language and BISINDO protection. 

Indonesian Sign Language (Bahasa Isyarat Indonesia, BISINDO) is often misunderstood as merely a gestural or simplified form of communication, undermining its linguistic sophistication and contributing to barriers to deaf inclusion in Indonesia. Approximately 2.6 million deaf individuals in the country rely on BISINDO as their primary language. This study explores the linguistic complexity of BISINDO, documenting its phonological, morphological, syntactic, and semantic systems. Using a mixed-methods approach, we analyzed 150 hours of BISINDO conversations from 80 deaf signers, conducted experimental studies on phonological distinctions and syntactic complexity, and performed ethnographic fieldwork in deaf communities and schools. Comparative analysis with American Sign Language (ASL) was also conducted. Our findings demonstrate that BISINDO is a fully developed natural language, with 45 handshapes, 18 locations, 23 movements, and 4 orientations in its phonological system. It shows productive morphological processes, flexible word order, and rich semantics, including idioms and metaphors. However, there are significant barriers to inclusion: 68% of deaf students lack qualified BISINDO teachers, and 84% of public services lack sign language interpreters. Furthermore, 72% of hearing Indonesians still do not recognize BISINDO as a legitimate language. Deaf community organizations, however, report BISINDO as central to their identity. The study highlights the need for policy reforms, including BISINDO recognition as an official language, qualified interpreters, bilingual deaf education, and public awareness campaigns to combat misconceptions.    

This community service program aims to empower the community of Ujung Tanah District, Makassar City in circular economy-based waste management. Ujung Tanah District as a coastal area with high population density faces complex waste problems, especially waste that ends up in the sea and disrupts the coastal ecosystem. The activities were conducted in four urban villages, namely Ujung Tanah, Tabaringan, Pattingalloang, and Pattingalloang Baru, involving 120 households as direct participants. The implementation methods included socialization and education, waste sorting and processing training, establishment of Waste Banks, mentoring for recycled product creation, and marketing system development. The results showed a significant improvement in community knowledge about waste management, with average scores increasing from 45.2 to 82.6. Four active Waste Bank units were established with a total of 320 household customers. The managed waste volume reached 2.4 tons per month with an economic value of IDR 8,500,000 per month. Recycled products include ecobrick crafts, bags from plastic packaging, and compost fertilizer. This program successfully changed the community paradigm from dumping waste into the sea to managing waste as a source of income.

This Community Service Program (PkM) aims to enhance character, life skills, and family capacity in supporting youth development in Parangloe District, Gowa Regency, South Sulawesi. The family entrepreneurship training activity was conducted through an educational approach, skills training, family workshops, and structured mentoring by involving youth as agents of change. Implementation methods included material presentations on the dangers of drugs, socialization of youth-family collaboration, exposition of entrepreneurship concepts, and hands-on practice in making handicrafts (mini brooches from felt fabric). The activity results demonstrated increased knowledge and understanding among youth regarding positive character values such as discipline, responsibility, and effective communication. Skills training had a significant impact on youth abilities in critical thinking, collaboration, and creativity development. Family empowerment through parenting pattern workshops yielded positive outcomes in parent-child relationships. This program is expected to serve as a model for human resource development at the local level and can be replicated in other regions to create a young generation with excellent character and competitive edge.

This Community Service Program (PKM) aims to provide direct socialization and mentoring to Micro, Small, and Medium Enterprise (MSME) actors in Biring Ere Village to enhance the quality and sustainability of their businesses. MSMEs play a vital role in the village economy as drivers of local economic growth and employment. However, various obstacles such as limited access to capital, low quality of human resources, restricted market access, lack of product innovation, and weak business management remain major barriers. This community service activity was conducted through interactive socialization methods, skills training, direct mentoring, and focused group discussions involving MSME actors, village heads, village officials, and the general community. The materials presented included business development strategies, basic financial management, product marketing techniques, product innovation and diversification, and access to capital. The results demonstrated increased understanding among MSME actors regarding business development strategies, heightened motivation to innovate, formation of collaborative business groups, and enhanced awareness of the importance of sound business management. This program has had a significant impact on empowering the community's economy and strengthening the capacity of MSME actors in Biring Ere Village to face global economic challenges.

Heritage language loss among immigrant and diaspora communities represents a critical challenge to cultural identity, intergenerational communication, and cognitive diversity. Traditional heritage language maintenance approaches face significant barriers including limited resources, lack of qualified instructors, geographic dispersion, and competing demands of dominant language acquisition. This study investigates the effectiveness of bilingual digital story applications as innovative tools for heritage language maintenance among children aged 4-12 years. Through a 24-month longitudinal mixed-methods study involving 1,843 families across eight language communities (Spanish, Mandarin, Arabic, Korean, Tagalog, Vietnamese, Hindi, and Polish), we examined language proficiency development, cultural identity formation, family engagement patterns, and app usage behaviors. Quantitative analysis of pre- and post-intervention language assessments revealed statistically significant improvements in heritage language vocabulary (effect size d=0.68), listening comprehension (d=0.54), and oral production (d=0.47) among children using bilingual story apps for at least 20 minutes daily. Qualitative findings from parent interviews and child focus groups highlighted the apps' role in making heritage language learning enjoyable, facilitating parent-child interaction, connecting children to cultural narratives, and normalizing bilingualism. However, effectiveness varied substantially based on app design features, with interactive elements, culturally authentic content, parent involvement scaffolds, and adaptive difficulty showing strongest associations with outcomes. This research demonstrates that thoughtfully designed bilingual story apps can serve as accessible, scalable tools for heritage language maintenance, though they function most effectively as complements to rather than substitutes for rich home language environments and community connections. The study contributes empirical evidence to inform app development, family language planning, and policies supporting linguistic diversity in increasingly globalized societies.

In the digital 4.0 era, language literacy and digitalization are key elements in the process of community empowerment, especially in rural areas that still face the challenge of limited access to information and technology. This study aims to analyze the effectiveness of language literacy strengthening and digitalization programs in supporting community empowerment in Takalar Regency, with an integrative approach that considers local context and cultural wisdom. The method used is a qualitative approach through participatory action research, which allows for the active involvement of the community in the process of identifying problems and finding solutions. The community service activity (PKM) was held in Ujung Baji Village, Sanrobone District, Takalar Regency on July 10, 2025, involving 25 participants with diverse social and educational backgrounds. The literacy expert team from ADPERTISI plays a role in designing and implementing multilingual-based training programs and approaches that are sensitive to local culture. This program has succeeded in significantly increasing people's digital literacy, with 60% of participants able to utilize technology for MSME development and 40% of participants successfully accessing public services independently through digital platforms. The "Techno-Linguistic Integration" model applied has proven to be effective in overcoming language barriers in the digital technology adoption process. The integration of local languages with digital devices creates an inclusive and relevant learning environment for rural communities. The results show that a holistic and contextual approach to strengthening language literacy and digitalization can empower communities in a sustainable manner, strengthen local capacity, and encourage digital transformation at the grassroots level. These findings make an important contribution to the development of technology-based community empowerment strategies and local culture in the digital era.

Community Service Activities (PKM) carried out by the STIA YAPPI LECTURER TEAM in collaboration with the Kalukubodo Village Government, South Galesong District, Takalar Regency, aims to increase local independence and food security in the area. This research explores collaboration between the two parties in designing and implementing programs that support sustainable agricultural development. By utilizing the potential of abundant natural resources, this activity includes training in agricultural techniques, use of technology, and effective natural resource management. The results of this activity show that the community's active participation in the training program increases their knowledge and skills, so they are able to optimize local resources to meet food needs independently. In addition, this collaboration also creates sustainable relationships between village governments and universities, opening up opportunities for innovation in resource management. It is hoped that this research can make a significant contribution to the development of models of local independence and food security in other villages in Indonesia.

In human development, it is often characterized as a developmental milestone where new behaviors emerge and are increasingly complex as the stages of development appear in this modern era. Development does notoccur at a constant pace. A relatively fast growth (spurt) can be interspersed with slow growth (plateau).Some scholars use such uneven patterns of growth and change as evidence of qualitatively different periods of development. From the results of the study found 3 factors that have the potential to affect the development of each child's reasoning,namely; Hereditary factors (heredity), environmental factors, heredity and environmental factors that interact to form behavior. The characteristics inherited by each child have a sensitive period, namely when children are active and motivated learners and when children construct their knowledge based on experience. In implanting physical and cognitive devices there is thought and language becoming increasingly interdependent; As thought and language begin to fuse, children often talk to themselves which is known as self-talk. Self-talk has an important function in cognitive development: By talking to themselves, children learn to guide and direct their own behavior in the process of performing difficult tasks and performing complex maneuvers_just as adults guide them.