The emphasis should be on "our" in the title: I think they mean Portugal's first involvement, which was around 1984. If you took "our" to mean Earth, then other PCs predate the ZX Spectrum and these.
Only recently I got to understand Timex spotlight in USA was long gone, while in the Iberian Penisula it was still all over the place, alongside ZX Spectrums and some MSX models.
I never knew anyone with a C64 back then.
Then the next computing wave was mostly Amiga, there were some people with Sam Coupe, until Windows 3.1 came to be, which is when I left my dear Timex 2068 into PC land, buying on credit, hardly anyone could afford paying on the spot.
That was eventually the next step, for the school trading ground activities.
Not that the Portuguese shops had any original stuff anyway, I bought several games with clear copied covers in black and white, without manuals.
Similar on how the Play Station spread about the country: burning CD's and modding the PSX was trivial.
Microhobby, Micromania, Solo Programadores (this one came later in 32 bits days), are some I still remember the names.
La Abadía del Crimen, Sir Fred, Livingstone Supongo, Game Over, and such.
If you are interested, I can send a zip to you with a PDF and the TAP files.
Also, on modernish platforms, there's "El archipiélago", probably the best Spanish Z Machine game ever. You can get the last one at IFDB. Getting the first saga it's a bit cumbersome because you need to get nine downloads and sort the 'volumes' after that.
Back to "Van Halen", as the games are designed with PAWS/GACG or whatever was called that universal format from the 80's, the Zesarux emulator can trap all the interpretatation (as if it were a ZMachine-like interpreter itself) and giving you options to both debug the adventures and translate them to Portuguese (from any to any language) on the spot with online services (and maybe local, IDK; it shoudn't be difficult to add support to Argos Translate, Apertium and the like). Input is not translated but, well, these games have a really common verb set.
https://cybernews.com/editorial/the-1977-trinity-and-other-e...