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to be able to speak; to be able to talk
to be understanding; to be sensible
彼女は三か国語を話せる。
She can speak three languages.
留学のおかげで、現地の人と自然に話せた。
Thanks to studying abroad, I was able to talk naturally with locals.
来日三年目で日常会話なら不自由なく話せている。
In my third year in Japan, I can handle everyday conversation without difficulty.