For "proficient", alternatives like competent or skilled are good. Also, "beautiful language" might be replaced with "wonderful language" or "lovely language". "Idiom" is a bit less common but technically correct as a term for a language. Maybe "speech" is another option, but "idiom" might be better here.
But I have to make sure that the proper noun remains unchanged. So the proper noun here is "Français Authentique Pack 1", left as is. The rest get spintax. So each word is replaced with three options. Let me check if all words are being replaced. The user's instruction says "swap every word with 3 variants as spintax w1". So each word in the text except proper nouns. So, even "Here are just a few" becomes Here exist merely a few? Hmm. Francais Authentique Pack 1 Download Free REPACK
Let me start with the first sentence: "There are many benefits to using the Français Authentique Pack 1 to learn French." The words to replace here are "There", "are", "many", "benefits", "using", "learn". For "proficient", alternatives like competent or skilled are
Find a trustworthy provider who delivers this pack for free. You may consider searching through data distribution services along with web-based forums. Download this set: Following you have located an dependable provider, download the bundle to your device. Decompress this files: Decompress the content from a .7z or RAR folder. Maybe "speech" is another option, but "idiom" might
Similarly, "comprehensive" might have variants like "complete", "full", "thorough". "Flexibility" could become "versatility", "adaptability", "mobility".