Most words for Earth foods, animals, plants, and similar “specialized” nouns do have not an equivalent word in Mando’a. There are a few ways around this.
One is to pick something similar that does exist in the language, such as using “striil” instead of “dog.”
The other is to design a Mando’a-sounding version of the desired term by picking your favorite version of the word from Earth and then massaging the spelling so it matches the sounds found in Mando'a. For example, with this method, “pizza” might be spelled “pitsa”([pee-tsah]) and “pineapple” might become “pinapel” ([peen-ahp-ehl]). For more information on pronouncing Mando'a letters, see this video: https://www.youtube.com/watch?v=-wRs65XyvHI
According to a post from the original conlang author on boards.theforce.net: "Mando'ade tend to call other species and races by the names they use for themselves, if they can pronounce them. ... Their rationale is this; if that's what folks want to call themselves, who are we to argue?" From the books, we know that some species names are lightly changed, if at all; for example, Jawa, Nikto, Kaminii. There's no reason to believe that Mandos would not simply use a version of names that the locals use for the plants, animals, foods, nobility titles, etc. of the local's planet. Equally, because we know some of the names of animals, plants, and food on Mandalore, we the readers have no reason to believe that the same creatures, foods, and so on that are on Earth also exist on a different planet.
Mando'a-adapted words are most suitable for personal journals and some types of fan fiction, rather than assuming that everyone will understand or want to adopt these versions of Earth words. Additionally, some servers might permit you to use them with the server-specific dialect, though be sure to ask first.
If you want names for in-universe Star Wars foods, animals, and so on, peruse Wookieepedia, or ask in the Star Wars Fan Fiction Discord server — https://discord.com/invite/HzQPYYd