By default the text for male user is shown. To use the template with text for female user, write anything as a first parameter. In English text for male and text for female are the same (to preview other language add "?uselang=xx" to the URL, where "xx" is the code of language needed). For example:

Text of template Template
{{User CEEM 2018}}
This user participated in WM CEE Meeting 2018.
{{User CEEM 2018|f}}
This user participated in WM CEE Meeting 2018.

To add a translation to new language, add "|xx = your text", where "xx" is the code of language needed, into the text of inclusion of template "LangSwitch", for example just after "|en = something". If in this language text differs for male and for female, use "{{gender switch|{{{1|}}}|Text for female|Text for male}}".