If the text is utf-8 but contains characters which are available in latin1 encoding, then you could convert it and read on any amiga editor for example.
For other character sets which the amiga has support for, it should also be possible. I believe you can use koi8 on amiga with suitable font for russian for example.
Something like iconv can convert from/to various encodings.
http://aminet.net/package/dev/lib/libiconv-1.9.2-bin-m68kI guess it wouldn't be that hard to code a simple text viewer using
http://aminet.net/package/util/libs/ttengine-68k and a free unicode truetype font.
