Is there a general definition for "with good manners"?

Question

Is there a general definition for "with good manners"?

Like it's used e.g. in relation to termination of employment relationship.

The Finnish employment law for example states that termination of employment relationship must be "with good manners" (it's translated as "factual"):

https://www-minilex-fi.translate.goog/a/ty%C3%B6suhteen-p%C3%A4%C3%A4tt%C3%A4minen-ja-luottamuspula?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=fi&_x_tr_pto=wapp

The employer is always required to provide a reason for dismissal, which in this context would be a lack of trust. This basis must also be factual and weighty. A similar reason for termination is not required from the employee, so the employee can terminate the employment relationship without reason.

However, if the expression was interpreted using:

with good manners:

The treatment of other people with courtesy and politeness, and showing correct public behaviour.

then the question arises.

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In particular, maybe the confusion is from double meaning in Finnish where "asiallinen" may mean both "factual" or "good-mannered". And I actually read the latter, and thought that what it means is that it cannot be based on e.g. a racist or sexist remark, which may be seen as not good-mannered.

Answer 1

The Finnish government's English version of Työsopimuslaki does not refer to "manners". It does refer to "particularly weighty reason" in Ch. 3 §5, and regarding termination in Ch. 7 §1 "The employer shall not terminate an indefinitely valid employment contract without proper and weighty reason". Subsequent §2 states what those reasons are not (illness, strike, politics, religion, filing a grievance). It is not prohibited to fire a person for being rude, if the factual circumstances are "weighty". The official Swedish version refers to "vägande sakskäl" in 7§1 and "sakliga och vägande" in 7§2, which I would unofficially translate as "weighty (factual) reason". The official Finnish version refers to "painavasta syystä" which Google tells me means "for a compelling reason".