Hi
Sorry for the delay.
There are some same text are included in the ThemeVan Shortcodes plugin, for example, if the product sections on the home page or shop page are added through Visual Composer, so you can find the language file in wp-content/plugins/themevan-shortcodes/languages.
The easy way to translate and generate the po file is that install Loco translation file, then you can click the Themes > ‘DGWork’ or ‘Plugins’ > ThemeVan Shortcodes, create the language file.
Every time you translate the texts, please remember sync the language file first.
Thanks