Targeting Language is the specific language you ask Facebook to target. For example, if you target the USA, you may specifically target English or Spanish speakers.
However, the Spoken Country Language is the formal language spoken in this country, regardless of your targeting. This language is defined for the country in which your ads are being shown. For example, English is spoken in Australia, Canada, UK, USA, etc., so you can see how your ads are doing for audiences speaking this language across several regions.
Copy Language is the language which you are using in your ad. You can use English to target people in non-English speaking countries and measure its performance. If you also target them in their native language, you can compare how the English copy does against the native-language copy and understand whether you should invest in translation.