\tl_set:Nn \stexthm@kw@theorem{Theorem}
\tl_set:Nn \stexthm@kw@observation{Observation}
\tl_set:Nn \stexthm@kw@corollary{Corollary}
\tl_set:Nn \stexthm@kw@lemma{Lemma}
\tl_set:Nn \stexthm@kw@axiom{Axiom}
\tl_set:Nn \stexthm@kw@remark{Remark}
\tl_set:Nn \stexthm@kw@example{Example}
\tl_set:Nn \stexthm@kw@definition{Definition}