What are the challenges in sustaining language proficiency long-term

What makes long-term language proficiency hard to maintain?

Sustaining language proficiency long-term is difficult because language skills fade when they are not used, supported, or reinforced in meaningful contexts. The main obstacles are declining practice, uneven instruction, low motivation, social and economic barriers, language complexity, and shifts in which language is used most often.

1. Lack of consistent practice and exposure to the language causes skills to decline over time. Without regular use, aspects like vocabulary, speaking fluency, and writing proficiency suffer. ^{1, 2}

This decline is often gradual rather than dramatic. A person may still recognize familiar words and understand the “gist” of messages, yet struggle to retrieve vocabulary quickly, produce accurate sentences, or keep pace in conversation. Speaking and writing usually weaken first because they require active recall, while listening and reading can remain somewhat stronger for longer.

2. Insufficient and inconsistent instructional support can slow or limit proficiency development, especially in the early stages. Long-term English learners (LTEL) often struggle more in reading and writing compared to listening and speaking. ¹

Early gaps matter because weak foundations tend to persist. If grammar, pronunciation, and core vocabulary are never stabilized, later practice has to repair old errors as well as build new ability. That creates a fragile profile: the language may feel familiar in passive comprehension, but less dependable in real-time use.

3. Motivation and engagement are critical, as maintaining interest over the long term is difficult. Psychological factors such as learner anxiety or loss of motivation negatively impact sustained language use. ^{3, 4}

Motivation is not static. Many learners start with clear goals, then lose momentum once progress becomes less visible. Anxiety adds another obstacle: fear of making mistakes can reduce speaking attempts, and fewer speaking attempts mean fewer chances to automatize useful phrases. In practice, active conversation practice tends to help more than passive review because it forces retrieval under realistic pressure.

Why does proficiency fade even after years of study?

Language attrition is not the same as forgetting everything at once. It is usually a pattern of slower recall, less precise expression, and reduced confidence. Learners often keep passive understanding longer than active production, which is why someone may still follow a film or article but hesitate in a live exchange.

The most vulnerable areas are the ones that depend on fast access:

• low-frequency vocabulary
• idiomatic expressions
• verb endings and agreement forms
• pronunciation details
• spelling and writing conventions

These skills weaken when they are not repeatedly activated in context. A word that is recognized in reading may still be unavailable in speech if it has not been used for months or years.

4. External socio-economic and cultural factors shape language retention. Limited resources, access to qualified teachers, cultural attitudes, social isolation, and high costs of language education contribute to challenges in maintaining proficiency. ^{5, 6}

These conditions often determine whether a language remains part of daily life or becomes a classroom-only skill. A learner who can only study occasionally, without real speakers or affordable classes, is far less likely to maintain strong fluency than someone embedded in a community where the language is heard and used regularly. Social isolation can be especially damaging for heritage speakers and bilinguals, because the absence of a real speaking environment accelerates attrition.

How language structure affects retention

5. The complexity of the language and difficulty in mastering specific skills can affect long-term retention and mastery. More complex language forms may be more easily forgotten unless strongly encoded initially. ^{7, 8}

Complexity matters because some elements are easy to recognize but hard to produce accurately. In German, case endings and article changes can be understood long before they are used reliably. In French, liaison, nasal vowels, and gender agreement may remain unstable even after years of exposure. In Japanese, honorific forms and sentence-final nuance can be especially dependent on context. In Russian and Ukrainian, aspect and inflection can create persistent production errors if they were never thoroughly practiced.

The more a feature must be retrieved instantly in conversation, the more likely it is to decay without active use. That is why memorized rules often survive longer than spontaneous performance.

6. Changes in usage patterns and language dominance, especially for bilinguals or second language learners, can lead to attrition or gradual loss of proficiency if the language is used less over time. ⁹

Language dominance shifts when one language takes over most work, family, school, or media functions. Once that happens, the other language becomes less automatic. This is common among bilinguals who move countries, change schools, or enter environments where one language is no longer needed for daily survival. The result is not always total loss, but a noticeable drop in speed, precision, and comfort.

The role of technology in long-term maintenance

7. Technological tools like AI chatbots and gamified learning can support motivation and practice but currently face challenges in cultural contextualization and sustaining learner attention long-term. ^{4, 3}

Technology is useful because it lowers the friction of practice. Short conversations, repetitive drills, and instant feedback make it easier to keep a language active between real-life interactions. But tools that are too predictable can become repetitive, and practice that ignores cultural context can produce language that is grammatical yet unnatural. A polite request in Spanish, for example, needs different phrasing depending on whether the setting is formal, friendly, or transactional.

The strongest long-term maintenance usually comes from combining tools with real usage: reading, listening, writing, and speaking in situations that resemble actual life.

Main long-term challenges at a glance

The most common reasons proficiency declines are:

• too little regular use
• weak or uneven early instruction
• low motivation or speaking anxiety
• limited access to speakers, teachers, or community support
• difficulty retaining complex forms
• shifting dominance toward another language
• practice methods that do not stay engaging or realistic

These factors usually interact. A learner who has little exposure may lose confidence; reduced confidence lowers practice; reduced practice speeds up attrition. That cycle is one reason language maintenance is often harder than initial acquisition.

Overall, sustaining language proficiency long-term requires continuous practice, motivational support, effective instruction, and favorable socio-cultural conditions. Without these, language skills tend to diminish gradually over time despite initial gains in learning. ^{2, 5, 1}

References

• How Long-Term English Learners Perform on an English Language Proficiency Assessment During Grades 2 through 5: An Examination of Assessment Tasks and Features

• Reviewing the Significance of Practice in Learning English as a Second Language

• Gamified EFL Instruction: Empirical Evidence for Enhanced Language Proficiency, Learner Motivation, and Idealized Bilingual Identity

• AI-Driven Chatbots as Language Tutors: Enhancing Written Proficiency in ESL

• Evaluating the Long-Term Impact of English Language Education on Socioeconomic Development in Rural Communities

• Addressing the Needs of Long-term Foreign Resident Families and Professionals with a Focus on Living Adaptation and Support Strategies

• Language Difficulty and Prior Learning Influence Foreign Vocabulary Acquisition

• Linguistic complexity in second language acquisition

• Longitudinal evidence for simultaneous bilingual language development with shifting language dominance, and how to explain it.

• Perspective: sustainability challenges, opportunities and solutions for long-term ecosystem observations

• LongMemEval: Benchmarking Chat Assistants on Long-Term Interactive Memory

• Long-Term Impact of an Occupational Therapy Intervention for Children With Challenges in Sensory Processing and Integration.

• Enhancing English Language Proficiency and Digital Literacy Through Metaverse-Based Learning: A Mixed-Methods Study in Higher Education

• Vending-Bench: A Benchmark for Long-Term Coherence of Autonomous Agents

• Language pedagogies and late-life language learning proficiency

• What Factors Influence Language Impairment? Considering Resilience as well as Risk

• What Factors Influence Language Impairment? Considering Resilience as well as Risk

• Lifelong learning and limiting factors in second language acquisition for adult students in post-obligatory education

• Long-term stability of core language skill in children with contrasting language skills.

• Learning How to Learn Languages: A Transformative Learning Approach to Empower Effective Language Learners

• Challenges Faced by the Second Language Learners: A Review

• Stability of core language skill across the first decade of life in children at biological and social risk.

• Adapting to the Dominant Language: Challenges and Coping Strategies

• Factors Affecting Speaking Proficiency in English Language Learning: A general overview of the speaking skill

• The Effects of Specific Learning Difficulties on Processes of Multilingual Language Development

• Smartphone English Language Learning Challenges: A Systematic Literature Review