Intuitive: instinctive, natural, inborn ✔️
"Additional resources" becomes additional assets – that works. assimil spanish audio
Explore: investigate, examine, study ✔️ "base". base. Benefits: advantages
Next sentence: "The Assimil method has been a cornerstone of language learning for decades..." "Cornerstone" – synonyms could be "foundation", "keystone", "base". base. and Rosetta Stone are proper nouns
Benefits: advantages, perks, upsides ✔️
"Assimil Spanish audio" is a brand and product name, so skip that.
For the list items: "Language Exchange Apps: Duolingo, Babbel, and Rosetta Stone are popular alternatives." Since Duolingo, Babbel, and Rosetta Stone are proper nouns, they stay. "Popular alternatives" might be widespread substitutes, well-known options, or commonly used choices.