regression between xslTNG 1.7.11 and 1.8.0 and later versions

Hi,

I tested all versions of xslTNG from 1.3 to the latest 1.11.1 versions

 From version 1.8.0, I cannot build my html any more.

It's a English/Chinese Pinyin/Chinese Hanzi document

I got this error:


**************
java -jar docbook-xslTNG-1.8.1/libs/docbook-xslTNG-1.8.1.jar 
Test-docbook/FSI-Chinese-MOD1-Textbook/FSI-Chinese-MOD1.xml > 181.html
Error at char 4 in expression in xsl:variable/@select on line 38 column 
81 of gentext.xsl:
   FODC0002  I/O error reported by XML parser processing
 
https://cdn.docbook.org/release/xsltng/current/xslt/locale/cmn-Latn-pinyin.xml:
 
https://cdn.docbook.org/release/xsltng/current/xslt/locale/cmn-Latn-pinyin.xml. 
Caused by
   java.io.FileNotFoundException:
 
https://cdn.docbook.org/release/xsltng/current/xslt/locale/cmn-Latn-pinyin.xml
at function fp:l10n on line 32 column 54 of gentext.xsl:
**********

Full output here: https://pastebin.yojik.net/?5

The document is accessible here: 
https://git.yojik.eu/eric/FSI-Chinese-docbook

The main document is : FSI-Chinese.xml

Is there a way to get around this regression (for me)?

Thanks for your advices.

Eric