Hello, thank you for your time but I solved the problem:

I simply used meta description and meta keyword inside of each article in the article manager in Joomla and everything is ok.

Hi,

In view/edit SEF URLs I am having problems with meta description - when I want to make individual description for every page, after saving, the diakritics (special characters, signs) is gone.

It is interesting that there are no such problems with Meta Keywords.

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Dobrý večer,

v sekci view/edit SEF URL mám problém s českou diakritikou v meta description, pokud chci mít pro každou stránku individuální. po uložení se mi místo správné diakritiky objevují otazníky.
Co s tím?