diff --git a/libdevcore/CommonJS.cpp b/libdevcore/CommonJS.cpp
index 9dc04b7e7..ad3ade71f 100644
--- a/libdevcore/CommonJS.cpp
+++ b/libdevcore/CommonJS.cpp
@@ -105,13 +105,8 @@ std::string fromRaw(h256 _n, unsigned* _inc)
 	return "";
 }
 
-Address fromString(std::string _sn)
+Address fromString(std::string const& _sn)
 {
-	if (_sn.size() > 32)
-		_sn.resize(32);
-	h256 n;
-	memcpy(n.data(), _sn.data(), _sn.size());
-	memset(n.data() + _sn.size(), 0, 32 - _sn.size());
 	if (_sn.size() == 40)
 		return Address(fromHex(_sn));
 	else
diff --git a/libdevcore/CommonJS.h b/libdevcore/CommonJS.h
index 0fb087f72..8b96b2e68 100644
--- a/libdevcore/CommonJS.h
+++ b/libdevcore/CommonJS.h
@@ -51,7 +51,7 @@ bytes padded(bytes _b, unsigned _l);
 bytes unpadded(bytes _s);
 std::string prettyU256(u256 _n);
 std::string fromRaw(h256 _n, unsigned* _inc = nullptr);
-Address fromString(std::string _a);
+Address fromString(std::string const& _a);
 
 template <unsigned N> FixedHash<N> jsToFixed(std::string const& _s)
 {
diff --git a/mix/AssemblyDebuggerCtrl.cpp b/mix/AssemblyDebuggerCtrl.cpp
index 36318ccb7..678f94d77 100644
--- a/mix/AssemblyDebuggerCtrl.cpp
+++ b/mix/AssemblyDebuggerCtrl.cpp
@@ -47,7 +47,7 @@ QString AssemblyDebuggerCtrl::contentUrl() const
 
 QString AssemblyDebuggerCtrl::title() const
 {
-	return "debugger";
+	return QApplication::tr("debugger");
 }
 
 void AssemblyDebuggerCtrl::start() const
@@ -63,7 +63,6 @@ void AssemblyDebuggerCtrl::keyPressed(int _key)
 		QString code = m_doc->toPlainText();
 		QtConcurrent::run([this, code]()
 		{
-
 			if (!m_modelDebugger->compile(m_doc->toPlainText()))
 			{
 				emit dataAvailable(false, DebuggingStatusResult::Compilationfailed);
@@ -101,5 +100,5 @@ void AssemblyDebuggerCtrl::updateGUI(bool success, DebuggingStatusResult reason,
 		this->addContentOn(this);
 	}
 	else
-		m_ctx->displayMessageDialog("debugger","compilation failed");
+		m_ctx->displayMessageDialog(QApplication::tr("debugger"), QApplication::tr("compilation failed"));
 }
diff --git a/mix/AssemblyDebuggerModel.cpp b/mix/AssemblyDebuggerModel.cpp
index bcf58835c..ad6ba156d 100644
--- a/mix/AssemblyDebuggerModel.cpp
+++ b/mix/AssemblyDebuggerModel.cpp
@@ -17,6 +17,7 @@
  * used as a model to debug contract assembly code.
  */
 
+#include <QApplication>
 #include "libethereum/Executive.h"
 #include "libethereum/Transaction.h"
 #include "libethereum/ExtVM.h"
@@ -90,7 +91,7 @@ DebuggingContent AssemblyDebuggerModel::getContractInitiationDebugStates(dev::u2
 	{
 		DebuggingContent r;
 		r.contentAvailable = false;
-		r.message = "compile failed";
+		r.message = QApplication::tr("compilation failed");
 		return r;
 	}
 
diff --git a/mix/ConstantCompilationCtrl.cpp b/mix/ConstantCompilationCtrl.cpp
index 8b0577d93..3ccd87f77 100644
--- a/mix/ConstantCompilationCtrl.cpp
+++ b/mix/ConstantCompilationCtrl.cpp
@@ -43,7 +43,7 @@ QString ConstantCompilationCtrl::contentUrl() const
 
 QString ConstantCompilationCtrl::title() const
 {
-	return "compiler";
+	return QApplication::tr("compiler");
 }
 
 void ConstantCompilationCtrl::start() const
@@ -80,13 +80,13 @@ void ConstantCompilationCtrl::writeOutPut(CompilerResult const& _res)
 		status->setProperty("text", "succeeded");
 		status->setProperty("color", "green");
 		content->setProperty("text", _res.hexCode);
-		qDebug() << QString("compile succeeded " + _res.hexCode);
+		qDebug() << QString(QApplication::tr("compile succeeded") + " " + _res.hexCode);
 	}
 	else
 	{
 		status->setProperty("text", "failure");
 		status->setProperty("color", "red");
 		content->setProperty("text", _res.comment);
-		qDebug() << QString("compile failed " + _res.comment);
+		qDebug() << QString(QApplication::tr("compile failed") + " " + _res.comment);
 	}
 }
diff --git a/mix/ConstantCompilationModel.cpp b/mix/ConstantCompilationModel.cpp
index f50ac805b..817d01635 100644
--- a/mix/ConstantCompilationModel.cpp
+++ b/mix/ConstantCompilationModel.cpp
@@ -20,6 +20,7 @@
  * Ethereum IDE client.
  */
 
+#include <QApplication>
 #include <QObject>
 #include <libevm/VM.h>
 #include <libsolidity/Scanner.h>
@@ -55,7 +56,7 @@ CompilerResult ConstantCompilationModel::compile(QString _code)
 	catch (...)
 	{
 		res.success = false;
-		res.comment = "Uncaught exception.";
+		res.comment = QApplication::tr("Uncaught exception.");
 		res.hexCode = "";
 	}
 	return res;
diff --git a/mix/KeyEventManager.cpp b/mix/KeyEventManager.cpp
index f5d638869..c32caadb8 100644
--- a/mix/KeyEventManager.cpp
+++ b/mix/KeyEventManager.cpp
@@ -39,5 +39,3 @@ void KeyEventManager::keyPressed(QVariant _event)
 {
 	emit onKeyPressed(_event.toInt());
 }
-
-