I am planning on learning a European language over the summer, probably German, Spanish or French. What is recommended both in terms of philosophy literature which is best understood in the original language, and what is recommended as a language which opens up more avenues of thought because of how the language is structured differently to English? For example, I have been told German has many subtle distinctions in its synonyms, which might make it harder to understand German philosophers in translation.

I am planning on learning a European language over the summer, probably German, Spanish or French. What is recommended both in terms of philosophy literature which is best understood in the original language, and what is recommended as a language which opens up more avenues of thought because of how the language is structured differently to English? For example, I have been told German has many subtle distinctions in its synonyms, which might make it harder to understand German philosophers in translation.

Edit: this is a hard question to answer 'objectively' but as someone with much less experience of philosophy it is harder for me to know the differences in the literature's or benefits of learning one language or another