Well-established

It is a well-established tradition.

An invented language is like a big poem. To learn one which is more or less well-established is a poetic adventure.

She's well-established in the community.

Maybe, Filipino dictionaries need upgrading to include English loanwords with Filipinized spelling. I am thinking of English-derived words like "metabolisem." Sometimes, some Filipinos would prefer it to the more well-established Spanish-derived word "metabolismo." Though "metabolisem" does not exist in Filipino dictionaries, maybe it and others like it should. The current treatment of English loanwords is to spell as is from the English, unlike what is done for Spanish loanwords.

The charity operates under the aegis of a well-established foundation.

The school has a number of well-established traditions.

This company is probably the most well-established in the industry.

The Shen-Kan-Ning Border Region will serve as an example of political practice during the war years. This Border Region, with a population of about one and a half million people in the three provinces (Shensi, Kansu, and Ninghsia), was by no means a typical example of the liberated areas. As the original Northwest base of the CCP and the area in which the Party Center was located, it was actually a "model" area of CCP control. However, precisely because of its well-established Party presence and its relative security from Japanese attack, the Shen-Kan-Ning Border Region set the pattern of government for all of the liberated areas.

‘There’s been a continuation of what was a well-established pattern of protests,’ [Jonathan Hill] explains.

It is well established that this methodology is problematic.