As found out by brute data sending, if you want to display large size English letters, you should use

LCDOUT $FE, $80, 163, 128+ASCII character code.

Code:
LCDOut $FE,$80,163,128+72,163,128+101,163,128+108,163,128+108,163,128+111,163,128+33 'Will display Hello! with large letters
Just these letters are as ugly, as most common Latin letters in Chinese fonts Also they're monospaced and use whole 16x16 area.
Here's an example.

Name: monospaced.jpg Views: 519 Size: 79.4 KB