How to set lang of Run?

I need set the lang of Run Empty.In docx,below:
<w:r><w:rPr><w:lang/></w:rPr><w:t>1</w:t></w:r>
In html:

<SPAN LANG="">	1</SPAN>
the para is:
<P ALIGN=LEFT STYLE="margin-bottom: 0cm"><FONT FACE="Times New Roman, serif"><SPAN LANG="zh-CN"><B><A HREF="#__RefHeading___Toc63328107"><FONT FACE="黑体, SimHei, monospace"><SPAN LANG="">heading1</SPAN></FONT><SPAN LANG="">	1</SPAN></A></B></SPAN></FONT></P>

How can I do?
Can Aspose do it?

the para
<P ALIGN=LEFT STYLE="margin-bottom: 0cm"><FONT FACE="Times New Roman, serif"><SPAN LANG="zh-CN"><B><A HREF="#__RefHeading___Toc63328107"><FONT FACE="黑体, SimHei, monospace"><SPAN LANG="">heading1</SPAN></FONT><SPAN LANG=""> 1</SPAN></A></B></SPAN></FONT></P>

the run is:<SPAN LANG=""> 1</SPAN>

@xl1,

Please ZIP and attach the following resources here for testing:

  • Your simplified source Word document
  • Aspose.Words 21.2 generated HTML file showing the undesired behavior
  • Your expected HTML file showing the desired output. You can create expected HTML file manually by using MS Word or any other editor.

As soon as you get these pieces of information ready, we will start further investigation into your scenario and provide you more information.