systemLanguage="en" removed while ungrouping (instead apply it to group's children)

Steps to reproduce:

  <g systemLanguage="en">
    <text fill="#000" font-family="DejaVu Sans, Euclid Circular B" font-size="506.65" stroke-width="13.33" x="1205.48" y="876.94">NEW</text>
	<text fill="#000" font-family="DejaVu Sans, Euclid Circular B" font-size="506.65" stroke-width="13.33" x="1205.48" y="2000">New2</text>
  </g>

• Change inkscape-GUI to English and restart
• open Keep_your_distance__pictogram__Switzerland__2020__cropped_.svg
• Ungroup the Text

What happened?

Keep_your_distance__pictogram__Switzerland__2020__cropped_x2.svg

 <text x="1205.48" y="876.94" fill="#000000" font-family="'DejaVu Sans', 'Euclid Circular B'" font-size="506.65px" stroke-width="13.33">NEW</text>
 <text x="1205.48" y="2000" fill="#000000" font-family="'DejaVu Sans', 'Euclid Circular B'" font-size="506.65px" stroke-width="13.33">New2</text>

What should have happened?

 <text x="1205.48" y="876.94" fill="#000000" font-family="'DejaVu Sans', 'Euclid Circular B'" font-size="506.65px" stroke-width="13.33" systemLanguage="en">NEW</text>
 <text x="1205.48" y="2000" fill="#000000" font-family="'DejaVu Sans', 'Euclid Circular B'" font-size="506.65px" stroke-width="13.33" systemLanguage="en">New2</text>

Inkscape Version and Operating System:

• Inkscape Version: Inkscape 0.92.4 (5da689c313, 2019-01-14)
• Operating System: Windows 10