Speaking multiple languages is an incredible skill. Whether you are bilingual, trilingual, or a true polyglot, your brain constantly switches between vocabulary, grammar systems, accents, and cultural contexts. But there is one challenge almost every multilingual person experiences: forgetting words.
You know the feeling. You understand a language perfectly, but suddenly forget a simple word during a conversation. Or you accidentally mix two languages together. This phenomenon is known as language attrition.
Language attrition refers to the gradual decline of language ability due to reduced exposure and use. Linguists describe it as a "non-pathological loss of a language," often caused by long periods of disuse. The Chartered Institute of Linguists explains how first and additional languages can weaken when they are not used regularly.
Why people forget languages so quickly
The brain prioritizes efficiency. If you stop using a language regularly, your brain strengthens the languages you use most often instead.
This is especially common for multilingual families, immigrants, expats, and international professionals. Someone may speak Turkish at home, Dutch socially, and English at work, but over time one language can slowly weaken if it is not actively maintained.
Research shows that vocabulary recall is often the first thing affected by language attrition. People may still understand a language well while struggling to retrieve words quickly during conversations.
This is why many polyglots experience moments like:
- "I know this word... but only in another language."
- "I can understand everything, but speaking feels slower."
- "I accidentally answered in Spanish instead of Italian."
The use-it-or-lose-it effect
One of the strongest predictors of language retention is frequency of use. The less exposure you have to a language, the weaker the neural connections become over time.
The good news is that maintaining a language does not require hours of studying every day.
Recent multilingualism research from 2024 found that consistent language maintenance habits are highly important for polyglots who want to prevent language attrition. The study looked at language maintenance in polyglots from a dynamic model of multilingualism perspective.
Small habits can already make a significant difference:
- Watching YouTube videos in your target language
- Listening to podcasts while commuting
- Reading articles or social media posts
- Having short conversations with family or friends
- Practicing quick vocabulary recall
For multilingual people, language maintenance is less about "learning from zero" and more about keeping existing pathways active.
Why language maintenance matters
Languages are closely connected to identity, culture, family, and memory. Losing fluency can feel emotional, especially for people who associate different languages with different parts of their lives.
Many polyglots also discover that maintaining several languages at once requires prioritization. Even experienced multilingual speakers often describe some languages as becoming "inactive" until they are used again consistently.
Researchers also suggest that previously learned languages can often be reactivated much faster than learning them from scratch again. Evidence on language relearning and reactivation points to the lasting traces of previous language knowledge.
For polyglots, maintaining languages is not just about communication. It is about preserving culture, confidence, relationships, and identity.
The future of language learning is language maintenance
Most language apps focus on beginners. But millions of multilingual people are not trying to learn their first foreign language anymore. They are trying to maintain the languages they already speak.
That is where language maintenance becomes important. Instead of endless beginner lessons, multilingual people benefit more from recall exercises, contextual vocabulary practice, and consistent exposure.
Because forgetting a language rarely happens overnight.
It happens word by word.
And often, a few minutes of regular activation is enough to keep those words alive.