Thank you very much with this forum, this is just kind a feedback (spanish language calligra use)
need some help in order to:

It doesn't work the spell check, neither underline bad text nor do some with an active input, or synonyms
indenting just the first line in paragraphs is hard to do (the indent goes to all paragraph)

The spell check can be enabled via a checkbox in the menu "Settings"->"Spellcheck"->"Auto Spell Check". I am however not sure if the support of spell check in Spanish language depends on some extra packages.

If you have the rulers enabled (in the menu "View"->"Show Rulers") there should be two arrows/triangles on the top ruler. The lower arrow can be pulled to set the indent for the whole current paragraph, while the upper one sets the indent for the first line only.
Another way to set the indent can be found in the "Text editing"-tab of the general docker. In the section "Paragraph" there is a button with three dots at the bottom right. Click on it and in the dialog that appears, choose the tab "Indent/Spacing". There you can enter an exact value for the indent of the first line.

The names of all the UI-elements will of course be different in Spanish, I hope you can still find them.