The problem of gender binary seems to be unavoidable when using this type of markings, however, there are different practices coming from LGBTQIA community that allow to be more inclusive. Consider the use of x in words like womxn or latinx.

One of the essential concepts in the current discourse on gender is heteronormativity, the attitude that heterosexuality is the sexuality by default. In English, there are ways to be more inclusive and avoid heteronormativity, especially when talking about relational terms.

Example:

partner or loved/beloved instead of girlfriend/boyfriend

sibling instead of sister/brother

parent instead of mother/father

spouse instead of wife/husband