Choosing between semolina and non-semolina durum flour I have a big confusion between flours, aggravated by the fact that I do not live in an english-speaking country and labeling and translations are confusing.
I like fresh pasta and have experimented with certain recipes and proportions of eggs, bread flour, semolina and durum flours. However, now I wanted to go into a little more detail regarding the flour but I am lost in translation.
My understandment so far:

Semolina is the specific way of taking a grain (which layers and parts) and converting it to &quot;powder&quot;.
Durum wheat is different from the typical wheat used for white bread flours.
Semolina from durum wheat (sometimes seen in recipes as &quot;semolina flour&quot; or simply &quot;semolina&quot;) is used in certain pasta recipes.
&quot;Non-semolina&quot; durum wheat flour exists and I cannot find the proper term for that in English. But I have it. And it's different from semolina.

First of all, are my understandings correct so far? Can some english native-speaker confirm the common terms for those things and what should I search for? Bonus points if there is any Italian speaker that can say them in Italian --that will allow me to search and understand more recipes, and I don't believe in automated translators for such niche terms.
And my main question, why and when may I use semolina and non-semolina durum wheat, and should I (may I?) combine it with bread flours? Should I change those proportions when doing egg-based fresh pasta? How will change the texture and flavour of the pasta when changing those flour proportions?
Your understanding is mostly correct. Durum flour is sometimes used for bread, generally mixed with softer flour. (Pasta is also sometimes made from a mix of hard and soft flours.) It's unusual (in my personal experience) to find soft wheat semolina labeled as &quot;semolina&quot;. More commonly it's labeled as &quot;rava&quot;, &quot;farina&quot;, or &quot;cream of wheat&quot;. Labelling will vary by region.
Pasta can be made from any of the flours you listed. Using semolina will give you a firm but tender pasta; coarse semolina will give you a rougher texture (but still firm/tender). Using part or all bread flour will result in a chewier, stretchier pasta (think hand-pulled Chinese noodles). Pasta dough with coarse semolina should be rested for a while before rolling out, as it takes longer to hydrate.