Is doubling the «que» a thing in French?

Question

If I were to translate a sentence like "I only want you to feel comfortable" from what I know I would say «Je ne veux que que tu sois à l'aise". Do French people actually double the «que», does the sentence even make sense, how would I say it to make it feel natural?

Answer 1

^{As @jlliagre said in their comment I made a mistake in my answer. Corrected.}

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What you suggest (using ne...que followed by a subordinate clause introduced with que) is not possible.

You could:
— Use the restrictive ne...que followed by a noun:

• Je ne veux que ton bien-être.

— Use an adverb instead of the restrictive ne...que and then have a subordinate clause:

• a- Je veux simplement que tu sois à l'aise.
• b- Je veux seulement que tu sois à l'aise.
  Option b- could be ambiguous since seulement could be understood as your not wanting anything else.

— Replace the restrictive ne...que with tout ce que:

• Tout ce que je veux c'est que tu sois à l'aise.
• Tout ce que je veux c'est ton bien-être.