[basque] ñ break document with hyperref in pdflatex

[zizaola]

The following MWE

\documentclass{article}
\usepackage[basque]{babel}
\usepackage{hyperref}
\begin{document}
Muñoz
\end{document}

breaks due to ´ñ running with pdflatex.

! LaTeX Error: Command \texttilde unavailable in encoding OT1.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...

l.5 Muñ
        oz

lualatex runs fine. If other language such as spanish is used the document runs fine.
If `hyperref`` is not loaded the document compiles fine.

The test has been done with the MikTeX updated to the same day, and with `TeX Live 2026.

[u-fischer]

The definition of \texttilde in the basque.ldf is faulty.

\documentclass{article} 

\usepackage[basque]{babel} 
%\usepackage[T1]{fontenc}
\DeclareTextAccent{\texttilde}{T1}{3}
\DeclareTextAccent{\texttilde}{OT1}{126}
\usepackage{hyperref} 
\begin{document} 
Muñoz 
\end{document}

[zizaola]

@u-fischer should the \DeclareTextAccent be in the basque.ldf file directly?
I check that there are no problems with ohter accents like à, á, ü, or ç. Basque dones't use those accents usually, but they can appear in conjuction with Sapnish or Frech texts.

Why is the problem appearing only with ñ?