tl;dr-ELT

How does an L2 evolve over time? Is there a linear progression, or does language shift in response to other factors rather than how many years we’ve been learning? A new sociolinguistic study suggests something more precise is at work: major life events.

The study

Wirtz & Pickl (2025) set out to test a long-held assumption in linguistics: that linguistic change across adulthood is better explained by lived experiences than by chronological age.

They surveyed 701 adult L1 German speakers in Austria using a large-scale online questionnaire. Participants identified a major life event from the previous 10–20 years that they felt had influenced their language use. These events spanned educational transitions (starting university, graduating), occupational changes (first job, career shifts, retirement) & personal domains (relocation, parenthood, new friendships).

Participants then rated perceived changes across five dimensions using fine-grained slider scales:

• Use of standard vs dialect across contexts: how much they felt their everyday language shifted towards more standard or more local forms when speaking with family, friends, at work or in public.
• Accommodation behaviour: whether they felt more or less likely to adjust their speech depending on who they were talking to, for example avoiding local forms with outsiders.
• Dialect identity: the extent to which they felt pride in, attachment to or identification with their local way of speaking.
• Attitudes towards the standard language: how positively or negatively they felt about using the standard variety, including comfort and liking rather than correctness.

The data were analysed using Bayesian statistical models, allowing the authors to capture individual variability rather than average age-based trends.

Crucially, the study focuses on perceived linguistic change. These self-reports don’t replace longitudinal recordings, but they offer a way to identify which life events speakers themselves associate with linguistic shifts.

The findings

Three results stand out.

First, perceived linguistic change in adulthood is the norm, not the exception. 79% of participants reported that a major life event had affected their language use or attitudes . Only a small minority reported complete stability.

Second, it’s not age that matters most, but the type of life event. Educational & work transitions tended to push speakers towards more standard language use, while events linked to social intimacy or disengagement from the workplace had the opposite effect. For example:

• starting university or a first job was associated with increased standard language use
• retirement & new friendships were linked to increased dialect use
• relocation correlated with greater use of the standard variety as a lingua franca

Think of an adult learner who moves into management & suddenly needs more formal English for emails & meetings, or someone who changes social circles & becomes more relaxed, idiomatic & local in their speech.

Third, attitudes change more than behaviour. Across almost all life events, affective factors shifted more strongly than actual language use. Dialect identity & accommodation tendencies were especially sensitive, while productive changes clustered closer to “moderate” levels. In other words, how speakers feel about language adapts faster than what they actually say.

This supports earlier work arguing against post-adolescent “linguistic fossilisation” (Labov, 1994; Sankoff, 2018) & aligns with lifespan perspectives in SLA that frame development as nonlinear & experience-dependent rather than age-bound (see also Bowie & Gerstenberg, 2023; Singleton & Pfenninger, 2022).

Why this matters for ELT

For language educators, this research is fascinating because it reframes adult language development as episodic rather than incremental. Progress, regression & restructuring may coincide with promotions, relocations, parenthood or retirement, not with birthdays.

It also helps explain why an adult learner’s confidence, register control or identity in English can shift rapidly even when classroom input stays constant.

Teacher takeaways?

• Adult learners’ language trajectories are shaped by life transitions as much as by instruction, so recent or upcoming changes in work, location or roles can explain sudden shifts in performance.
• Changes in confidence, identity or accommodation often appear before measurable gains or losses in accuracy or fluency, making affective shifts an early signal of deeper change.
• Apparent “plateaus” may simply reflect periods of life stability between disruptive events, rather than a lack of progress or learning capacity.

If language changes when lives change, how much space do we make in our teaching to acknowledge what’s happening outside the classroom?