如何正确显示groff中的波兰变音符号？

我正在玩，groff并且我想从以下内容生成pdftest.ms

.TL
Tytuł
.AU
Imię Nazwisko
.NH
Wstęp
.PP
Pierwszy paragraf. Jakieś informacje, żeby były polskie znaki.
.PP
Drugi paragraf. Reszta znaków:

ąęćłńśóżźĄĘĆŁŃŚÓŻŹ
.NH
Bla bla bla
.PP
safsdsdfsasdds

如您所见，它包含波兰音符号。编译完成后，groff -ms test.ms -T pdf > test.pdf我们将看到以下混乱情况：

我的第一个猜测是使用utf-8支持重新编译。

$ groff -Kutf8 -ms test.ms -T pdf > test.pdf
test.ms:4: warning: can't find special character `u0065_0328'
test.ms:8: warning: can't find special character `u0073_0301'
test.ms:8: warning: can't find special character `u00A0'
test.ms:8: warning: can't find special character `u007A_0307'
test.ms:12: warning: can't find special character `u0061_0328'
test.ms:12: warning: can't find special character `u006E_0301'
test.ms:12: warning: can't find special character `u007A_0301'
test.ms:12: warning: can't find special character `u0041_0328'
test.ms:12: warning: can't find special character `u0045_0328'
test.ms:12: warning: can't find special character `u004E_0301'
test.ms:12: warning: can't find special character `u0053_0301'
test.ms:12: warning: can't find special character `u005A_0307'
test.ms:12: warning: can't find special character `u005A_0301'

Groff只是忽略了大多数符号，而pdf看起来像这样：

经过一番谷歌搜索后，我发现了这一点：

groff -Kutf8 -Tdvi -mec -ms test.ms > test.dvi
dvipdfm -cz 9 test.dvi

是的，它仍然会失败（虽然更好，但只跳过了一个字符）：

$ groff -Kutf8 -Tdvi -mec -ms test.ms > test.dvi
test.ms:8: warning: can't find special character `u00A0'

我怎样才能使它正常工作？

编辑：这是输出locale

LANG=pl_PL.UTF-8
LANGUAGE=
LC_CTYPE="pl_PL.UTF-8"
LC_NUMERIC="pl_PL.UTF-8"
LC_TIME="pl_PL.UTF-8"
LC_COLLATE="pl_PL.UTF-8"
LC_MONETARY="pl_PL.UTF-8"
LC_MESSAGES="pl_PL.UTF-8"
LC_PAPER="pl_PL.UTF-8"
LC_NAME="pl_PL.UTF-8"
LC_ADDRESS="pl_PL.UTF-8"
LC_TELEPHONE="pl_PL.UTF-8"
LC_MEASUREMENT="pl_PL.UTF-8"
LC_IDENTIFICATION="pl_PL.UTF-8"
LC_ALL=