Fonte: https://github.com/afmachado/simple-matrix/tree/patch-1/res/values-pt-rBR

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">Matrix Calc</string>
    <string name="action_settings">Configurações</string>
    <string name="title_section1">Básico</string>
    <string name="title_section2">Determinante</string>
    <string name="title_section3">Inversa</string>
    <string name="calculate">Calcular!</string>
    <string name="action_clear">Limpar</string>
    <string name="title_activity_display_result">DisplayResultActivity</string>
    <string name="warning">        Se no Modo Fração, o ponto age como divisor do numerador/denominador. (ex: "1.2" = "1/2")
</string>

    <string-array name="operations">
        <item>+</item>
        <item>-</item>
        <item>*</item>
    </string-array>
    <string-array name="dimensions">
        <item>Calculadora de Matriz 2x2</item>
        <item>Calculadora de Matriz 3x3</item>
        <item>Calculadora de Matriz 4x4</item>
    </string-array>

    <string name="title_activity_main_activity3">MainActivity3</string>
    <string name="hello_world">Olá, mundo!</string>

</resources>/






<resources>

    <string name="title_activity_settings">Configurações</string>

    <!-- Strings related to Settings -->


    <!-- Example General settings -->
    <string name="pref_description_rational">Marque isso para habilitar entrada/saída fracional em vez de entrada/saída decimal</string>
    <string name="pref_title_rational">Modo Fração</string>

</resources>