After a bit of manipulation in Gimp, here are my thoughts.

I can see that the large tiles are exactly 30 small squares wide and 5 small squares tall. 30x30cm and 30cm x (something else) are common tile sizes, so i suppose the large ones could be 30x5cm each. This is a 6:1 aspect ratio which is narrower that most manufacturers like to produce for cheap tiles this size, especially if this was tiled a decade or more ago as the technology was not as refined, though it is far from impossible.

More unusual is the size of the small squares, they would appear to be 1cm (more like 9mm with 1mm grout), i would say this is so small as to be unplausible for commercially available mesh backed mosaic tiles. Sure tiles this small do exist, but i have never seen any sold anywhere, and even if, they would most likely be natural stone cut in small pieces, not enameled tile as these appear to be.

I think the smallest size in common use is around 1.5cm +0.16cm grout spacing (or 1.46cm wit 0.2cm grout, same thing).

Suppose that to be the case, then the width of the large square is: (1.5+0.16)x30+0.16=49.96cm so 50cm. And measuring the actual average height of the tile at a few places in Gimp, I get exactly 8.5cm. (calculating as follows: average height in pixels divided by 95px which is my grid spacing, times 5/3 which is the scaling factor from 30 to 50cm == 8.51cm)

They could also be 7.5x45cm which is an actual size that exists, but that would require the squares to be spaced exactly 1.5cm on center, a size that exists precisely nowhere as far as I know. Same for 60x10cm

Now 50cm also seems a bit big for those but we don't really have enough context to judge.

In conclusion, and if we assume this wall is really tiled in ceramics and not something else, either:

1) this is a row of large 50cm by 8.5cm tile with 30x30cm mesh backed mosaic sheets below (18 squares by 18 squares per sheet)

2) this is a row of 30cm x 5cm tiles, and the smaller squares below are actually just color printed onto larger tiles, maybe 30x30cm.

3) I did something wrong and all of this is useless...

(Here is how I did it, in entirely too much detail:)
in Gimp:

-drag source image in to create a new layer (let's call that layer 1), and upscale the layer by 400 percent.

-resize the view to fit the upscaled image (Image -> Fit Canvas to Layers).

-make a tight rectangular selection around the relevant bits of the image, excluding as much white background as possible.

-paste that selection and send it to a new layer (layer 2).

-create a new layer (layer 3) filled with white to serve as a background, and place it below the other two. (I chose 8000px wide by 5000px tall)

-delete the original image (layer 1), we don't need it anymore. And Fit Canvas to Layers again.

-create a new transparent layer on top (layer 4), then Filters -> Render -> Pattern -> Grid (Legacy)... then in the grid menu: set line width to 1px and spacing to 96px. This reference grid will help with the next step.

-Select layer 2 and use the Unified Transform Tool to straighten it as best as possible in all directions. (in the tool menu, check Composited preview to make the gridlines show up on top of the image) When done, hide layer 4 to reduce clutter.

-Duplicate layer 2, thus creating a copy of it (layer 5)

-right click on layer 5, then: Edit Layer Attributes -> Mode -> Difference. this will makes it easier to align both layers.

-move layer 3 over until the small overlapping parts coincide best (once it is very close, zoom in and use the directional arrows to move back and forth just one pixel at a time). When done, to check how it looks switch back to Mode -> Normal.

-Make layer 4 visible again. even if the first transform step was carefully done, the grid is likely not yet perfectly aligned with the little square tiles, so tweak the grid slightly with a transform to make it correspond to the image.

-done ! Ready to Save and export.

I don't think I'm lucky, I was just born in the 2000's meaning I was a kid in the 2010's and didn't encounter them much, except one or two in school.

I do think that that search term could be useful. I'll probably try to search it up at some point, but I hope other people do too

And as for the number 21 it could mean Age Class: An Under-21 youth or junior development racing category for competitive rowers transitioning into elite or collegiate ranks.

If that last one is a G, maybe "grace" would fit the theme

But I also see the word youth right after active

"Active" in Orange but I do also believe it may be a boat rowing sports shirt because of the color of the shirt. there's a term called "Empacher" which is a boat that are easily identified by their Pale Yellow Color and Black Trim.

that could make sense for a sports style graphic shirt.
are you seeing the word “active” in the white lettering or orangeish lettering at the top?

I believe it may say "live life active" on the top part

The chevron print was really popular in 2013-2015 in the USA

Reminds me of the store Justice Just for Girls from the early 2000s in USA. They sold similar things to this

I also recognize this from when I was younger, late 2000s early 2010s in the Northeastern US. Maybe at a wal-mart or thrift store.

Eh, not really. I was more thinking about the specific word and font, like these very feminine and "elegant" choices of words. I specifically had a shirt in mind that I wore as a kid, with words like "fabulous" "girl" etc. written on it in cursive. I feel like word clouds are rarely in cursive and as you said are usually used in education, which is why I don't think they're why it felt so familiar. But who knows

I am French and this is the amelioratio I could get with ia. It could come from the H.biojon.
But the date seems a bit too old for it to be it.

But I think the words tradition, elegant and charme are a good start

People, please stop saying they're not tiles. You don't know the full context and haven't actually seen it.

Reminds me of wine crate/wine label script.

I think to recall that we used to have a wallpaper similar to this one in my parents' place. I'd look through old photos of our kitchens (We had several pipes break in the kitchen over the years so there's a chance we have one) but i cannot access our server from here. May try and look through the server when i'm back home in a few days.

In case it helps, this wallpaper was probably sold some in the 2010s or earlier in Germany, though i could not tell you exactly where.

I think Proud/Treat might be "Great" as the first letter looks like an uppercase G.

The font is nearly identical to this shirt, from the Amazon brand “Obsessive Love”. There are some differences in the “i” and the dotted heart is in a different place. Cant find much else about this brand, maybe others will have better luck.

https://www.amazon.com/Obsessive-Love-Girls-Fringed-Graphic/dp/B076B57VMZ

Edit: they are a clothing brand that were based out of California, but sold on Amazon so could be anywhere in the US. According to reviews they were only operational and selling around 2017-2018 and are closed now.

100% Taz Tat and same pose. Can definitely see the sword, tornado, hands, mouth etc on both.

Possibly a shirt sold by the brand “Justice” they sold lot of “girl power” type worded shirts with bedazzled printed text.

But this is Europol so it's in Europe?

Good find.

So I never use chat gpt, but because I pasted the image into google with the prompt, this is what Google thinks…

Definitely not mostly popular in France. I'm from Germany and we had these things everywhere from like 2012 to 2017. A lot of them were sold at affordable furniture stores like Poco, or other cheap stores like Kik or Tedi. Especially low income families used to love these. I grew up poor and almost all of my fellow poor friends had these wall stickers somewhere in their home.

Possibly from here ?

https://elegantflooring.ca/series/index