Here are various ways to suppress linting in general, not just spelling.

auto isnt_1{0}; // NOLINT - just this line

//  NOLINTNEXTLINE(???)  can't find a warning ??? to suppress for spelling
auto isnt_2{0};           // shows error

// NOLINTBEGIN              suppress lint on a block
auto isnt_3{0};
auto isnt_4{0};
// NOLINTEND

auto isnt_5{0};       // shows misspelling because line active