9b1629e2_re_Comparison___Google_Updates__Keyword_Planner
[Function] Limitation according to language [Keyword Tool] Search volume filtered depending on the language queries (number of search volume gets smaller): Language targeting [Keyword Planner] 
Take into account only words of this language, foreign terms (partly also Anglicisms) completely fall out of the research: Language word filter
Google AdWords Keyword Planner vs. Keyword Tool: SEO & PPC Feature Comparison | Google Updates
Keyword Planner