[daniyel]

If the text contains only plain, boring letters and you see the word "the" being used a few times... you're looking at a text in English.

[timthorn]

Though æ is used in English, too.

[skykooler]

Quite rarely, however. Especially in American english (British English still uses it for some spellings, like "encyclopædia").

[timthorn]

Yes, I have noted the American difference. Pedophile means something quite different!

[ygra]

And ë or ö, archaically ;)

[bmm6o]

English with a lot of ë's and ö's means you're reading The New Yorker.

[eru]

And ï.