How do you signify different text sizes and font weights in paper wireframes?

When sketching wireframes on paper, we normally use lines to indicate text. How do you indicate visual weight for different text sizes, though?
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How do you create both sufficient contrast and a harmonious outcome for text on different tints of the same color?

Here are two examples. One is a table, the other an illustration. Both use different tints of the same color with text on top. How do you change the color of the text across these tints to be both harmonious as well as having enough contra…
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How do you localize the {verb} + {noun} pattern?

By example, if we take [Resend confirmation email], how would you localize that for Germany?
[Bestätigungsmail erneut senden] (noun + verb)?
Are there design guidelines available online?
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What is the reason behind different touch target size recommendations between Android and iOS?

Touch target size on Android: 48dp
Touch target size on iOS: 44pt