Top definition
When you speak two languages, and begin forgetting vocabulary in both of them.
Sara claimed to be bilingual, but everybody knows she is really byelingual
by ToxicNuggzz July 02, 2020
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2
When you speak two languages but slowly lose vocabulary in both of them.
"Bro It's been so long in quarantine that I think I am going byelingual."
by Demoknight TF2 August 23, 2020
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