diff --git a/src/ksanewidget.cpp b/src/ksanewidget.cpp
--- a/src/ksanewidget.cpp
+++ b/src/ksanewidget.cpp
@@ -70,20 +70,6 @@
     SANE_Int    version;
     SANE_Status status;
 
-    //qDebug() <<  "The language is:" << KGlobal::locale()->language();
-    //qDebug() <<  "Languagelist" << KGlobal::locale()->languageList();
-
-    /*
-        see http://community.kde.org/Frameworks/Porting_Notes#KDECore_Changes:
-        For translation support, use KLocalizedString (ki18n framework). Translation catalogs are no longer dynamically inserted,
-        so the idiom KGlobal::locale()->insertCatalog("somecatalog") is no longer available.
-        To simply make the code build, for the sake of porting other things first, just remove or comment out these calls.
-        This will stop translations from working, and to fully port them eventually, follow the section
-        "Connecting Calls to Catalogs" in ki18n programmer's guide.
-     */
-    //KGlobal::locale()->insertCatalog("libksane"); // FIXME KF5
-    //KGlobal::locale()->insertCatalog("sane-backends"); // FIXME KF5
-
     s_objectMutex.lock();
     s_objectCount++;
 
diff --git a/src/options/ksaneoptbutton.cpp b/src/options/ksaneoptbutton.cpp
--- a/src/options/ksaneoptbutton.cpp
+++ b/src/options/ksaneoptbutton.cpp
@@ -54,8 +54,8 @@
         return;
     }
 
-    m_widget = m_button = new KSaneButton(parent, i18n(m_optDesc->title));
-    m_widget->setToolTip(i18n(m_optDesc->desc));
+    m_widget = m_button = new KSaneButton(parent, sane_i18n(m_optDesc->title));
+    m_widget->setToolTip(sane_i18n(m_optDesc->desc));
     connect(m_button, &KSaneButton::clicked, this, &KSaneOptButton::buttonClicked);
 
     updateVisibility();
diff --git a/src/options/ksaneoptcheckbox.cpp b/src/options/ksaneoptcheckbox.cpp
--- a/src/options/ksaneoptcheckbox.cpp
+++ b/src/options/ksaneoptcheckbox.cpp
@@ -56,8 +56,8 @@
         return;
     }
 
-    m_widget = m_checkbox = new LabeledCheckbox(parent, i18n(m_optDesc->title));
-    m_widget->setToolTip(i18n(m_optDesc->desc));
+    m_widget = m_checkbox = new LabeledCheckbox(parent, sane_i18n(m_optDesc->title));
+    m_widget->setToolTip(sane_i18n(m_optDesc->desc));
 
     connect(m_checkbox, &LabeledCheckbox::toggled, this, &KSaneOptCheckBox::checkboxChanged);
 
@@ -94,7 +94,7 @@
         m_checkbox->setChecked(m_checked);
     }
     if ((old != m_checked) && ((m_optDesc->cap & SANE_CAP_SOFT_SELECT) == 0)) {
-        emit buttonPressed(name(), i18n(m_optDesc->title), m_checked);
+        emit buttonPressed(name(), sane_i18n(m_optDesc->title), m_checked);
     }
 }
 
diff --git a/src/options/ksaneoptcombo.cpp b/src/options/ksaneoptcombo.cpp
--- a/src/options/ksaneoptcombo.cpp
+++ b/src/options/ksaneoptcombo.cpp
@@ -52,7 +52,7 @@
 
     m_widget = m_combo = new LabeledCombo(parent, QStringLiteral(""), QStringList());
     readOption();
-    m_widget->setToolTip(i18n(m_optDesc->desc));
+    m_widget->setToolTip(sane_i18n(m_optDesc->desc));
     connect(m_combo, static_cast<void (LabeledCombo::*)(int)>(&LabeledCombo::activated), this, &KSaneOptCombo::comboboxChangedIndex);
     readValue();
 }
@@ -93,7 +93,7 @@
 
     m_strList = genComboStringList();
     m_combo->clear();
-    m_combo->setLabelText(i18n(m_optDesc->title));
+    m_combo->setLabelText(sane_i18n(m_optDesc->title));
     m_combo->addItems(m_strList);
     m_combo->setIcon(QIcon::fromTheme(QStringLiteral("color")),
                      getSaneComboString((unsigned char *)SANE_VALUE_SCAN_MODE_COLOR));
diff --git a/src/options/ksaneoptentry.cpp b/src/options/ksaneoptentry.cpp
--- a/src/options/ksaneoptentry.cpp
+++ b/src/options/ksaneoptentry.cpp
@@ -56,8 +56,8 @@
         return;
     }
 
-    m_widget = m_entry = new LabeledEntry(parent, i18n(m_optDesc->title));
-    m_widget->setToolTip(i18n(m_optDesc->desc));
+    m_widget = m_entry = new LabeledEntry(parent, sane_i18n(m_optDesc->title));
+    m_widget->setToolTip(sane_i18n(m_optDesc->desc));
     connect(m_entry, &LabeledEntry::entryEdited, this, &KSaneOptEntry::entryChanged);
     updateVisibility();
     readValue();
diff --git a/src/options/ksaneoptfslider.cpp b/src/options/ksaneoptfslider.cpp
--- a/src/options/ksaneoptfslider.cpp
+++ b/src/options/ksaneoptfslider.cpp
@@ -53,7 +53,7 @@
 
     m_widget = m_slider = new LabeledFSlider(parent, QStringLiteral(""), FIXED_MIN, FIXED_MAX, MIN_FIXED_STEP);
     readOption();
-    m_widget->setToolTip(i18n(m_optDesc->desc));
+    m_widget->setToolTip(sane_i18n(m_optDesc->desc));
     connect(m_slider, &LabeledFSlider::valueChanged, this, &KSaneOptFSlider::sliderChanged);
     readValue();
 }
@@ -81,7 +81,7 @@
     }
     m_minChange = m_slider->step() / 2;
     m_slider->setSuffix(unitDoubleString());
-    m_slider->setLabelText(i18n(m_optDesc->title));
+    m_slider->setLabelText(sane_i18n(m_optDesc->title));
 }
 
 void KSaneOptFSlider::readValue()
diff --git a/src/options/ksaneoptgamma.cpp b/src/options/ksaneoptgamma.cpp
--- a/src/options/ksaneoptgamma.cpp
+++ b/src/options/ksaneoptgamma.cpp
@@ -56,7 +56,7 @@
         return;
     }
 
-    m_widget = m_gamma = new LabeledGamma(parent, i18n(m_optDesc->title),
+    m_widget = m_gamma = new LabeledGamma(parent, sane_i18n(m_optDesc->title),
                                           m_optDesc->size / sizeof(SANE_Word));
     connect(m_gamma, &LabeledGamma::gammaTableChanged, this, &KSaneOptGamma::gammaTableChanged);
     if (strcmp(m_optDesc->name, SANE_NAME_GAMMA_VECTOR_R) == 0) {
@@ -69,7 +69,7 @@
         m_gamma->setColor(Qt::blue);
     }
 
-    m_widget->setToolTip(i18n(m_optDesc->desc));
+    m_widget->setToolTip(sane_i18n(m_optDesc->desc));
     updateVisibility();
     readValue();
 }
diff --git a/src/options/ksaneoption.h b/src/options/ksaneoption.h
--- a/src/options/ksaneoption.h
+++ b/src/options/ksaneoption.h
@@ -44,9 +44,15 @@
 #include <sane/saneopts.h>
 }
 
+#define SANE_TRANSLATION_DOMAIN "sane-backends"
+
 namespace KSaneIface
 {
 
+inline QString sane_i18n(const char *text) {
+    return i18nd(SANE_TRANSLATION_DOMAIN, text);
+}
+
 class KSaneOptionWidget;
 
 class KSaneOption : public QObject
diff --git a/src/options/ksaneoption.cpp b/src/options/ksaneoption.cpp
--- a/src/options/ksaneoption.cpp
+++ b/src/options/ksaneoption.cpp
@@ -61,7 +61,7 @@
     }
 
     if (m_optDesc) {
-        m_widget->setToolTip(i18n(m_optDesc->desc));
+        m_widget->setToolTip(sane_i18n(m_optDesc->desc));
     }
 
     readOption();
diff --git a/src/options/ksaneoptslider.cpp b/src/options/ksaneoptslider.cpp
--- a/src/options/ksaneoptslider.cpp
+++ b/src/options/ksaneoptslider.cpp
@@ -53,7 +53,7 @@
 
     m_widget = m_slider = new LabeledSlider(parent, QStringLiteral(""), KSW_INT_MIN, KSW_INT_MAX, 1);
     readOption();
-    m_widget->setToolTip(i18n(m_optDesc->desc));
+    m_widget->setToolTip(sane_i18n(m_optDesc->desc));
     connect(m_slider, &LabeledSlider::valueChanged, this, &KSaneOptSlider::sliderChanged);
     readValue();
 }
@@ -96,7 +96,7 @@
         m_slider->setStep(1);
     }
     m_slider->setSuffix(unitString());
-    m_slider->setLabelText(i18n(m_optDesc->title));
+    m_slider->setLabelText(sane_i18n(m_optDesc->title));
 }
 
 void KSaneOptSlider::sliderChanged(int val)