I get crazy with this issue. Most of my users have German Pipedrive UI, but some have French. Problerm is now, that this language setting is used for Google Address resolution. So at the end we have for sample for Germany "Deutschland" and other contacts with "Allemagne"... when you want to filter by country this drives you crazy and data quality is sh*t.
Please implement general account setting "Google address resolution language" to ensure unified address data.