@sportshistorybuff,
If you accidentally touch ctrl and shift with more than one language installed on the computer then you would move around eg. US QWERTY, International, and Canadian French.
Settings → Time & Language → Language & Region → Keyboards
shows the exact list of languages Windows is cycling through on your computer.
If you don't require other languages then in Options allow only US QWERTY and inadvertent language change is precluded.
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