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Well, I guess that anyone with determination can learn to speak Mandarin to be understood more or less.
But forget about memorizing thousands of characters in order to read and/or write it.
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Actually, you've got it backward.
Thank you very much for your opinion.
Other people (including me) feel that it is easier to learn how to speak a foreign language than to read and write it (especially like Chinese, which uses characters instead of an alphabet).
Have you ever tried to learn Mandarin?
Yes, I studied a little in about 1960(!) with a gentleman who was a journalist in war-time Chungking.
Because I do NOT have an ear for languages, I personally found it easier to write it than speak or understand it. When I was younger, I would "correspond" with people in Hong Kong, Taiwan, and Singapore. Of course, I butchered the language, but they apparently got the essence of what I was trying to say. As you know, there is no conjugation of Chinese verbs, thank goodness.
I have read that some American students have great joy in speaking Mandarin and eventually in understanding it. For example, like those flight attendants who can learn some common phrases to use with passengers. To read and to write characters, however, would probably discourage all but the most dedicated students. Even with simplified characters, all those different strokes to memorize can be daunting.