There's a reason so few modern languages are pictographic.
Apparently, the fear is that some pre-contact tribe in the Amazon rainforest would not understand the labels on a car's controls.
Now your second toolbar is probably hidden by some hover or keyboard action (in my browser it is reviled by a single press of my left alt key) it is all text and has numerous categories such as view, bookmarks, help, tools, etc. inside these categories there are functions such as copy, synced tabs, troubleshoot, etc. (mine is actually in Icelandic and many of those words I’m seeing for the first time and have no clue what they mean).
If your app has only a few functions putting the correct icon next to the function label can help you navigate to your desired function more easily. If your app has a lot of functions (like your browser, or a document processor) all these icons will be an overkill, so you only design an icon for the most essential/most used functions (back, zoom in, boldface, undo, etc.). If loading a language model is an essential feature in your app, which is often performed, it may help users to have an icon next to the label (and sometimes even in place of the label if the label is complicated). Personally for “load language model” I probably would just use the upload icon (commonly an arrow pointing upwards from a bucket).
In the words of Eleanor Shellstrop, "No, it's annoying, and I'm right not to."
Not everything -- not even close to everything -- should be an icon at all.
Looking up at my browser toolbar, I can count several icons that are so abstract that I can't remember what they do without wasting about 4 seconds on each button waiting for a tooltip. Some "UX Designer" thought it was important to not label icons, because of either aesthetic "elegance" or space worries, and as a result they've wasted a 3-inch strip of space with 4 icons that I'll never use. If they'd used text or labeled-icon buttons, they could have fit the top 2 functions. Same situation but even more intense with VS Code. So fun to teach someone how to use this by speaking to them. "Click the button with the three tiny circles connected by lines." "In the Find window, click the button with three uneven horizontal lines." (Obviously that conveys "Find in selection" right? Much better than those 3 words with a checkbox!) Or in that same UI, how about "Letters 'ab' relaxing in a boat made of a knocked-over square bracket" icon?
I don't get it. This absolute trash style of UI wasn't needed in order for us to get advanced and detailed tasks done on 9" 512x384 4:3 screens. I have a 4K screen and plenty of space and every desktop app seems to think the most important thing is squeezing its entire UI into a tiny strip or floating bar.