What is Language transfer?
Language transfer is when habits from a language you already know shape the new one you're learning — helpfully (positive transfer, like Spanish speakers guessing Italian words correctly) or unhelpfully (negative transfer, like English speakers putting adjectives before French nouns).
Transfer explains why difficulty is relative: German is 'easy' for Dutch speakers and 'hard' for Korean speakers, because the distance being crossed differs. Every hours-to-fluency estimate is really a transfer-distance estimate from English.
Negative transfer hides in every layer: pronunciation (your first language's mouth habits), grammar (word order you didn't know was optional), and vocabulary (false friends). The fix isn't avoiding your first language — it's getting corrected early, before the borrowed habit hardens.
What it means for your speaking
Transfer errors are invisible on flashcards and audible immediately in conversation — a listening partner catches your borrowed word order in seconds. Speaking early exposes your transfer habits while they're still soft enough to fix.
Practise out loud — 30 seconds a day →