Hi,
To fix this problem, you need to open your SVG icons file with some editor like Sublime Text or default system text editor and add height and width attributes to your <svg>
tag like it is shown on the screenshot https://gyazo.com/83fd36b0bb9628bb1aed2bd3d5d063c5
Then you will need to reupload your icons in WordPress Dashboard.
As for the translations, it seems like you kept them in the theme folder. You have to keep all the translations in wp-content/languages/themes/
folder as per our documentation and video tutorial.
Regards