micro:bit stays unlit when asked to output/flash characters that are not basic ASCII

[anzhou5]

Is your feature request related to a problem? Please describe. The micro:bit LEDs do not flash non-basic ASCII characters even if they are entered to be shown on the device. No error or indicator is given. For example, if you try to have the micro:bit output a string using non-Latin alphabet characters, if the characters are not supported, the micro:bit LEDs will do nothing and remain black.

Describe the solution you'd like To provide some indicator that the input is being read, even if it is not shown.

Describe alternatives you've considered Flashing something like a "?" or an error message to indicate this is happening and give an explanation to a user as to why