Following T185332 which provided a possible way to display formatted lexeme in a statement.
The approach outlined in T185332 however requires the "whole" lexeme to be loaded from the storage in order to display the lexeme.
This is not an efficient enough approach in the production scale.
Preferably, only the actual "labels" would be loaded from the storage, and if "labels" of multiple entities must be loaded, they're only loaded once and all at once.
The approach to be investigated is storing data relevant for displaying lexemes in some data structure, possibly something reminding wb_terms for items and properties.
Data needed for searching for lexemes is NOT going to be stored there.
The outcome of the investigation would be some code that outlines to the possible implementation (intentionally simplified etc), that allows to answer questions whether the approach is viable, whether localizable data (e.g. labels of language and lexical category items) is stored in a scalable enough manner, and whether the approach could be also satisfying for other uses where lexeme is being "displayed" in some way, and/or whether the approach also "scales" for similar use case of forms and senses.
Planned time of investigation is one day.
The alternative, which is out of scope of this investigation, would be to stored needed data in wb_terms table somehow.