“If you like” in Japanese
Short answer
If you like in Japanese is “何なら” (nannara). Full meaning: if you like, if you prefer, if it suits you, if it's fine with you, if you don't mind, if necessary; if ... doesn't suit you, if you don't like ..., if ... doesn't take your fancy; what's more, furthermore.
Other ways to say “If you like” in Japanese
何でしたら
nandeshitara if you like, if you prefer, if it suits you, if it's fine with you, if you don't mind, if necessary
良かったら
yokattara if you like
宜しかったら
yoroshikattara if you don't mind, if you like
もし良かったら
moshiyokattara if you don't mind, if you like, if you feel up for it, if you're interested
何だったら
nandattara if you are so inclined, if it suits you, if you like
言ってみれば
ittemireba in a manner of speaking, as it were, so to speak, if you like, per se
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