Not a plea for help since I imagine using the word bank allows the text to be accepted. And no, I’m not trying to get it to fail by using 二 instead of ニ. I’m pretty sure the exercise is bugged.
For my own reference, 二 is U+4E8C, “CJK UNIFIED IDEOGRAPH-4E8C” while ニ is “KATAKANA LETTER NI” (U+30CB).
Just a guess, but was there an extra space after the comma? Unlike in English, the full-width comma takes up an entire square worth of space like all other characters and shouldn’t have an extra space after it. I don’t know if Duolingo even considers spaces when marking answers though so that may not be it.
Although I can’t prove it with just the image, my input method editor (fcitx5) seems to only use full-width characters, even for commas, when I use it to input Japanese text. I had completed several dozen other exercises, many containing commas, which seemed to work fine with Duolingo. Even copy-pasting their “Correct solution” did not work and I believe it contained a full-width comma.
If you’re familar with Python, can you try this script? (please replace the string
aandbwith your input and the answer)$ python >>> import unicodedata >>> a = 'はい、 コンビニです。' >>> print('\n'.join(f'{hex(ord(c))}, {unicodedata.name(c)}' for c in a)) 0x306f, HIRAGANA LETTER HA 0x3044, HIRAGANA LETTER I 0x3001, IDEOGRAPHIC COMMA 0x3000, IDEOGRAPHIC SPACE 0x30b3, KATAKANA LETTER KO 0x30f3, KATAKANA LETTER N 0x30d3, KATAKANA LETTER BI 0x30cb, KATAKANA LETTER NI 0x3067, HIRAGANA LETTER DE 0x3059, HIRAGANA LETTER SU 0x3002, IDEOGRAPHIC FULL STOP >>> b = 'はい、コンビニです。' >>> print('\n'.join(f'{hex(ord(c))}, {unicodedata.name(c)}' for c in b)) 0x306f, HIRAGANA LETTER HA 0x3044, HIRAGANA LETTER I 0x3001, IDEOGRAPHIC COMMA 0x30b3, KATAKANA LETTER KO 0x30f3, KATAKANA LETTER N 0x30d3, KATAKANA LETTER BI 0x30cb, KATAKANA LETTER NI 0x3067, HIRAGANA LETTER DE 0x3059, HIRAGANA LETTER SU 0x3002, IDEOGRAPHIC FULL STOP
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