General consistency:
* Pare-pareho - This means "the same" or "uniform."
* Magkatulad - This also means "similar" or "alike."
Consistency in quality or performance:
* Palaging - This means "always" or "constantly."
* Matatag - This means "stable" or "steady."
* Pare-pareho ang kalidad - This means "consistent in quality."
Consistency in behavior or principles:
* Matapat - This means "faithful" or "true to one's word."
* Tapat - This also means "honest" or "sincere."
* Sumusunod sa prinsipyo - This means "follows principles."
The best translation will depend on the specific meaning you want to convey.