Closes #19

changelog.md

@@ -10,6 +10,16 @@ existing Git tag; subsequent changes are listed as unreleased.
 
 #### Fixed
 
+- Issue #19: parse signal factor, offset, minimum, and maximum independently of
+  C/C++ application locales with `std::from_chars`, retaining signed decimals,
+  scientific notation, complete-token validation, and range/finite checks.
+- Added custom C++ and named C comma-decimal locale regressions for valid physical
+  values and invalid syntax, grouping, overflow/underflow, and reversed ranges.
+  Documented portable test coverage and Linux locale generation. Verified with
+  `qmake6`, `make -j4`, and `LOCPATH=/tmp/dbc-issue19-locales make check`: all six
+  suites passed without skips. The named C locale regression fails with the old
+  `std::stod` converter.
+
 - Issue #18: frame/signal comments share frame-definition CAN ID validation and
   resolve after definitions are read. Support tabs, escaped quotes/backslashes,
   and multiline text while preserving whitespace and starting source locations.