Perhaps you can change the label of your taxonomy, as seen on the Function Reference
Somewhere in your code, there must be something like
register_taxonomy("bikes", "post", [
// ...
]);
you can change it to
register_taxonomy("bikes", "post", [
"label" => "Bicycle"
]);
PLEASE NOTE that this part is the definition of the taxonomy itself. Changing it means changing the taxonomy itself and it can affect other parts of your project.