Best way is to translate the text using POEdit. You can also override the widget as explained below –
https://siteorigin.com/docs/widgets-bundle/getting-started/extending-existing-widgets/
BTW, I cannot find any ‘read more’ text in the post carousel widget. Where are you seeing this?
Hi there. Sorry, actually the widget is ‘LiveMesh grid’. This is my site: http://www.gruppoformamentis.it/wp/ you can find the ‘read more’ button under ‘ALCUNE ESPERIENZE IN CORSO’. Thank you
Pls have a look at this thread –
https://codex.ww.wp.xz.cn/Customizing_the_Read_More#Modify_the_Read_More_text_when_using_the_the_excerpt.28.29
Have the text provided there in your child theme and the text you use in the custom function should work.
You should also check your theme code for this since the button is derived from the theme code. You may want to check with the developer of the theme regarding this.
