Wiktionary:Babel
en This user is a native speaker of English.
fr-3 Cette personne peut contribuer avec un niveau avancé de français.
es-3 Este usuario puede contribuir con un nivel avanzado de español.
de-2 Dieser Benutzer hat fortgeschrittene Deutschkenntnisse.
it-1 Questo utente può contribuire con un livello semplice di italiano.
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I'm building a language immersion website that includes Wiktionary definitions and I try to contribute here when I notice something missing.

JS-4 This user can write and understand all kinds of complex JavaScript code.