diff --git a/src/render/katerenderer.cpp b/src/render/katerenderer.cpp
--- a/src/render/katerenderer.cpp
+++ b/src/render/katerenderer.cpp
@@ -980,6 +980,10 @@
      * qreal fontHeight = font.ascent() + font.descent();
      */
     m_fontHeight = qMax(1, qCeil(m_fontMetrics.ascent() + m_fontMetrics.descent()));
+    // Try to use representitve character from English, Chinese, Japanese
+    // and Korean to calculate the line height.
+    // The characters being tested are "AHIygあ你말".
+    m_fontHeight = qMax(m_fontHeight, qCeil(m_fontMetrics.boundingRect(QString::fromUtf8("AHIyg\xe3\x81\x82\xe4\xbd\xa0\xeb\xa7\x90")).height()));
 }
 
 void KateRenderer::updateMarkerSize()