Regelmäßig vs. regulär
While English often uses the word "regular" to cover various contexts, German draws a distinct line between repetition and conformity. The choice between regelmäßig and regulär depends entirely on whether you are talking about frequency over time or adherence to a standard norm.
Regelmäßig
A2This word describes something that happens repeatedly at fixed time intervals or follows a consistent rhythm. It is used when focusing on frequency, habits, or recurring events.
Ich gehe regelmäßig ins Fitnessstudio.
(I go to the gym regularly.)
Der Zug fährt regelmäßig um halb acht ab.
(The train departs regularly at half past seven.)
Du musst die Pflanzen regelmäßig gießen.
(You must water the plants regularly.)
Wir bekommen regelmäßig Updates zum Projekt.
(We receive updates on the project regularly.)
Sein Herzschlag ist absolut regelmäßig.
(His heartbeat is absolutely regular.)
Regulär
B1This word implies that something is standard, normal, official, or in accordance with the rules. It often contrasts with something that is special, discounted, temporary, or exceptional.
Der reguläre Preis ist mir zu hoch.
(The regular price is too high for me.)
Wir haben außerhalb der regulären Öffnungszeiten geschlossen.
(We are closed outside of regular opening hours.)
Er ist kein regulärer Soldat, sondern ein Söldner.
(He is not a regular soldier, but a mercenary.)
Die reguläre Spielzeit ist vorbei.
(The regular playing time is over.)
Das ist ein ganz regulärer Vorgang bei der Bank.
(That is a completely regular procedure at the bank.)
Summary
To choose the correct word, look at the context of time versus standards. Use regelmäßig if the event repeats over time or has a rhythm (associated with frequency). Use regulär if the object or event is the standard, official, or normal version (associated with rules and norms).