I can't think of many words that rhyme with computer so would get picked up.
There aren't many legitimate ways to have people audibly self hypnotise themselves using your brand.
It's very black mirror.
" I don't understand your query. "
PIZZA P IY1 T S AH0
Looks like I can search for " T S " to find the "ts sound that's not at the end" % grep " T S " cmudict-0.7b | wc -l
991
Some of the non-proper nouns include ACCOUNTANCY, ANTSY, and ARTSY. I'll assume this is too close to the end to count, so require two sounds after the " T S ": % grep -E " T S [A-Z0-9]+ [A-Z0-9]+" cmudict-0.7b | wc -l
853
These include: bestseller, blitzkrieg, boatswain, bootstrap, chutzpah, craftsman, draftsmanship, footstep, hotspot, itself, jetstream, outscore, outsell, outside, postscript, shirtsleeve, shortstop, sportsmanship, statesmen, tsar, tsunami, whatsoever, yachtsman, and zeitgeist.(It doesn't have "spritzer" in the list, and uses the spelling "matzoh" instead of "matzo". I didn't look for a more complete list of word pronunciations.)
Finally, two words with two occurrences of the "ts" sound, neither at the end:
% grep -E " T S .*T S " cmudict-0.7b
ITSY-BITSY IH2 T S IY0 B IH1 T S IY0
TSETSE T S IY1 T S IY0Pronunciation (Received Pronunciation, General American) IPA(key): /ˈtsaɪtˌɡaɪst/, /ˈzaɪtˌɡaɪst/
https://www.merriam-webster.com/dictionary/zeitgeist also gives two: ˈtsīt-ˌgīst ˈzīt-
I tried to get statistics from listening to https://youglish.com/pronounce/zeitgeist/english? but found I have a hard time distinguishing the two forms.
https://www.etymonline.com/word/boatswain even comments:
> Phonetic spelling bo'sun/bosun is attested from 1840. Fowler [1926] writes, "The nautical pronunciation (bō'sn) has become so general that to avoid it is more affected than to use it."
~ Fatso
~ Pitstop
~ Katsup
~ Yachtsman
~ Scotsmen
~ Batsman
There don't seem to be many, admittedly.
Google Ngram says it wasn't until the 1970s when "pizza" was more commonly used than "tsetse." https://books.google.com/ngrams/graph?content=tsetse%2Cpizza... . Or from BoingBoing today, "North Americans feared and misunderstood pizza in the 1950s" - https://boingboing.net/2022/11/21/north-americans-feared-and... .
The ideal would be for the voice assistant to have some completely unique word, ideally with sound combinations that are very rare in your native language. And if for some reason, that still doesn't work for you, have a way to change it. Or maybe just not have a default, and require users to pick their own keyword.