Slavic languages use it that way. For example polish "jest" starts with the same sound as yeast.
Not only that, but in Serbo-Croatian, in latin script, "nj" is a digraph for the ɲ phoneme. (A very small number of words, mostly of Latin origin, can cause ambivalence because they have "n" and "j" juxtaposed but are meant to properly be pronounced separately, e.g. "konjugacija" /con-yu-gatsiya/ (conjugation)). In fact, correct transcription of "new" would really be "nju" (but only in Serbian, there is no transcription of foreign words in Croatian), so you have "Njujork" for "New York".
German uses it that way too (ja, Jürgen, etc.).
What languages have you looked at? It's very common in northern Europe.