Weird Font Issues:
Some games have low resolution fonts or completely unreadable fonts.
The best example is Rune Factory 4. The font is so garbled that certain letters are cut in half. Oddly enough it only affects lower case letters. Upper case letters are completely fine.
The low resolution texts is because it doesn’t scale with the internal resolution. This is how it’s been with emulators that scale. Look at PPSSPP and you will see how low resolution the texts are.
As for the cut off text. Normally users are required to dump the shared font from their 3DS but recently an open source replacement was added. The thing is that it may not work correctly all the time like in your example but it should be enough to play the game. The line in the log that indicates this is:
[1496.280811] Service.FS <Warning> core/file_sys/archive_ncch.cpp:OpenFile:123: Shared Font file missing. Loading open source replacement from memory