Administrative Templates language pack wrong region tag
Finnish language pack folder name has changed in 'Administrative Templates (.admx) for Windows 10 (1703) Creators Update’ package.
Earlier the language files folder name was fi-FI (as normal Finnish region tag in Windows systems), now it is fi-FL (I can't find region tag for that). Maybe typo; please check and correct tag in next release (1709). Reported this also directly to PG.