For lack of what I'm told are called "alt codes" on windows, I made a .txt file to keep interesting characters such as:
"Ða fæmnan þe gewuniað onfon gealdorcræftigan & scinlæcan &
wiccan, ne læt þu ða libban." (BTW this is English!)
and
º ¤ § ª ³ ¶ ¹ ¼ ¿ Â × þ ¢ ¥ « ® ± º ½

Lost the REAL dot, as it comes out as a ?
Now I've finally found the "not equal to" symbol, ≠ , and everytime I save it, it turns into another ?
Tried all my editors, including oo, they all do the same thing.

This here spell checker also hates the ≠

Is there a way to save this ≠ ?

if the file is encoded with ASCII then it can only support those characters.. it seems the characters in question you have listed are Unicode characters. see if there is an option to save the file with unicode encoding.

also, how is that english? ive never seen those words in any of my dictionaries before.

OK, I'll look for a save option. Thanks.

It's Olde English from maybe 800 years ago.

..Later...
No way found of saving it.

Well as far as Oo.org goes, you can find all these symbols in "Insert -> Special characters" (some of them under different fonts tho). For other editors this is an issue of character encoding as Nadroj suggested.

Aha! Oo.org wins again.
Thanks