}

    /**
     * Initializes session security keys for signing and sealing.
     * @param mk the master key to derive session keys from
     */
    protected void initSessionSecurity(final byte[] mk) {
        this.signKey = deriveKey(mk, C2S_SIGN_CONSTANT);
        this.verifyKey = deriveKey(mk, S2C_SIGN_CONSTANT);

        if (log.isDebugEnabled()) {

Find the `supported.languages` property (around line 202) and ensure your language code is included:

```properties
supported.languages=ar,bg,bn,ca,ckb_IQ,cs,da,de,el,en_IE,en,es,et,eu,fa,fi,fr,gl,gu,he,hi,hr,hu,hy,id,it,ja,ko,lt,lv,mk,ml,nl,no,pa,pl,pt_BR,pt,ro,ru,si,sq,sv,ta,te,th,tl,tr,uk,ur,vi,zh_CN,zh_TW,zh
```

**Optional configurations:**

If you create online help documentation:
```properties

et=et\n\
eu=eu\n\
fa=fa\n\
fi=fi\n\
fr=fr\n\
gl=gl\n\
gu=gu\n\
he=he\n\
hi=hi\n\
hr=hr\n\
hu=hu\n\
hy=hy\n\
id=id\n\
it=it\n\
ja=ja\n\
ko=ko\n\
lt=lt\n\
lv=lv\n\
mk=mk\n\
ml=ml\n\
nl=nl\n\
no=no\n\
pa=pa\n\
pl=pl\n\
pt=pt\n\
pt-br=pt-br\n\
pt_BR=pt-br\n\
ro=ro\n\
ru=ru\n\
si=si\n\
sq=sq\n\
sv=sv\n\
ta=ta\n\
te=te\n\
th=th\n\

ky: Кыргызча
la: latine
lb: Lëtzebuergesch
lg: Luganda
li: Limburgs
ln: Lingála
lo: ພາສາ
lt: lietuvių kalba
lu: Tshiluba
lv: latviešu valoda
mg: fiteny malagasy
mh: Kajin M̧ajeļ
mi: te reo Māori
mk: македонски јазик
ml: മലയാളം
mn: Монгол хэл
mr: मराठी
ms: Bahasa Malaysia
mt: Malti
my: ဗမာစာ
na: Ekakairũ Naoero
nb: Norsk bokmål
nd: isiNdebele
ne: नेपाली
ng: Owambo
nl: Nederlands

          "site.gr.jp",
          "site.jp",
          "site.lg.jp",
          "site.ma",
          "site.mk",
          "site.ne.jp",
          "site.or.jp",
          "site.quick.jp",
          "site.tenki.jp",
          "site.tv",
          "site.us",
          "some.org.mk",
          "stanford.edu",
          "state.ca.us",
          "uomi-online.kir.jp",
          "utenti.blah.it",

          "site.gr.jp",
          "site.jp",
          "site.lg.jp",
          "site.ma",
          "site.mk",
          "site.ne.jp",
          "site.or.jp",
          "site.quick.jp",
          "site.tenki.jp",
          "site.tv",
          "site.us",
          "some.org.mk",
          "stanford.edu",
          "state.ca.us",
          "uomi-online.kir.jp",
          "utenti.blah.it",

mh

// mil : https://www.iana.org/domains/root/db/mil.html
mil

// mk : https://www.iana.org/domains/root/db/mk.html
// see also: http://dns.marnet.net.mk/postapka.php
mk
com.mk
org.mk
net.mk
edu.mk
gov.mk
inf.mk
name.mk

// ml : http://www.gobin.info/domainname/ml-template.doc
// see also: https://www.iana.org/domains/root/db/ml.html
ml

miyoshi.hiroshima.jp
miyoshi.saitama.jp
miyoshi.tokushima.jp
miyota.nagano.jp
mizuho.tokyo.jp
mizumaki.fukuoka.jp
mizunami.gifu.jp
mizusawa.iwate.jp
mjondalen.no
mjøndalen.no
mk
mk.eu.org
mk.ua
ml
mlb
mlbfan.org
mls
mma
mmafan.biz
mn
mn.it
mn.us
mo
mo-i-rana.no
mo-siemens.io
mo.cn
mo.it
mo.us
moareke.no
mobara.chiba.jp

     * hi=hi<br>
     * hr=hr<br>
     * hu=hu<br>
     * hy=hy<br>
     * id=id<br>
     * it=it<br>
     * ja=ja<br>
     * ko=ko<br>
     * lt=lt<br>
     * lv=lv<br>
     * mk=mk<br>
     * ml=ml<br>
     * nl=nl<br>
     * no=no<br>
     * pa=pa<br>
     * pl=pl<br>
     * pt=pt<br>
     * pt-br=pt-br<br>
     * pt_BR=pt-br<br>
     * ro=ro<br>
     * ru=ru<br>

miyoshi.hiroshima.jp
miyoshi.saitama.jp
miyoshi.tokushima.jp
miyota.nagano.jp
mizuho.tokyo.jp
mizumaki.fukuoka.jp
mizunami.gifu.jp
mizusawa.iwate.jp
mjondalen.no
mjøndalen.no
mk
mk.eu.org
mk.ua
ml
mlb
mlbfan.org
mls
mma
mmafan.biz
mn
mn.it
mn.us
mo
mo-i-rana.no
mo-siemens.io
mo.cn
mo.it
mo.us
moareke.no
mobara.chiba.jp