Where does “פֿאַלש” come from?

פֿאַלש (Yiddish) comes from Middle High German valsche, from Finnish falski, from Swedish falsk — false; untrustworthy.

פֿאַלש (Yiddish): false

Definitions

Step	Language	Word	Meaning
1	Middle High German	valsche	—
2	Finnish	falski	fake, insincere, phony; false, spurious; out of...
3	Swedish	falsk	false; untrustworthy

פֿאַלש — Etymology, Origin & Word History | Etymology Explorer